[{"date_created":"2026-06-29T06:35:48Z","department":[{"_id":"156"}],"type":"journal_article","publication":"Transactions of the Indian Institute of Metals","issue":"6","abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n                  <jats:p>Mechanical joining processes have played an increasingly important role in the manufacturing of modern lightweight structures due to a greater variety of materials. The growing number of joining tasks requires a large number of joining elements. Friction spun joint connectors (FSJC) offer an innovative approach that meets the growing demand for flexibility. This process combines rotational movement and axial force to create targeted friction heating, enabling the production of FSJCs and the joining of various sheet metal materials. The shape of the FSJC can be optimally adapted to the joining situation in question, providing a significant advantage in terms of process chain versatility. This paper investigates FSJCs made of the steel grades C45E+C (1.1191) and 115CrV3 (1.2210), the effect of in situ quenching during the joining process. The influences of the essential parameters of rotational speed, feed rate, and FSJC length on the mechanical properties after quenching are being focused on and compared to similar conditions during joining without quenching. At the same time, the material change is analyzed to determine the effect of different alloy approaches on hardness profiles and strength characteristics in cross-tensile testing. For this purpose, systematic test series with varying process parameters are conducted and evaluated using hardness measurements and cross-tensile tests.</jats:p>","lang":"eng"}],"language":[{"iso":"eng"}],"article_number":"90","doi":"10.1007/s12666-026-03846-5","publication_identifier":{"issn":["0972-2815","0975-1645"]},"author":[{"full_name":"Nordieker, Ansgar Bernhard","first_name":"Ansgar Bernhard","last_name":"Nordieker","id":"88725"},{"first_name":"Werner","last_name":"Homberg","full_name":"Homberg, Werner","id":"233"}],"year":"2026","title":"Quenching During Thermomechanical Joining Using Friction Spun Joint Connectors","intvolume":"        79","publication_status":"published","date_updated":"2026-06-29T06:49:45Z","citation":{"chicago":"Nordieker, Ansgar Bernhard, and Werner Homberg. “Quenching During Thermomechanical Joining Using Friction Spun Joint Connectors.” <i>Transactions of the Indian Institute of Metals</i> 79, no. 6 (2026). <a href=\"https://doi.org/10.1007/s12666-026-03846-5\">https://doi.org/10.1007/s12666-026-03846-5</a>.","short":"A.B. Nordieker, W. Homberg, Transactions of the Indian Institute of Metals 79 (2026).","ieee":"A. B. Nordieker and W. Homberg, “Quenching During Thermomechanical Joining Using Friction Spun Joint Connectors,” <i>Transactions of the Indian Institute of Metals</i>, vol. 79, no. 6, Art. no. 90, 2026, doi: <a href=\"https://doi.org/10.1007/s12666-026-03846-5\">10.1007/s12666-026-03846-5</a>.","apa":"Nordieker, A. B., &#38; Homberg, W. (2026). Quenching During Thermomechanical Joining Using Friction Spun Joint Connectors. <i>Transactions of the Indian Institute of Metals</i>, <i>79</i>(6), Article 90. <a href=\"https://doi.org/10.1007/s12666-026-03846-5\">https://doi.org/10.1007/s12666-026-03846-5</a>","bibtex":"@article{Nordieker_Homberg_2026, title={Quenching During Thermomechanical Joining Using Friction Spun Joint Connectors}, volume={79}, DOI={<a href=\"https://doi.org/10.1007/s12666-026-03846-5\">10.1007/s12666-026-03846-5</a>}, number={690}, journal={Transactions of the Indian Institute of Metals}, publisher={Springer Science and Business Media LLC}, author={Nordieker, Ansgar Bernhard and Homberg, Werner}, year={2026} }","ama":"Nordieker AB, Homberg W. Quenching During Thermomechanical Joining Using Friction Spun Joint Connectors. <i>Transactions of the Indian Institute of Metals</i>. 2026;79(6). doi:<a href=\"https://doi.org/10.1007/s12666-026-03846-5\">10.1007/s12666-026-03846-5</a>","mla":"Nordieker, Ansgar Bernhard, and Werner Homberg. “Quenching During Thermomechanical Joining Using Friction Spun Joint Connectors.” <i>Transactions of the Indian Institute of Metals</i>, vol. 79, no. 6, 90, Springer Science and Business Media LLC, 2026, doi:<a href=\"https://doi.org/10.1007/s12666-026-03846-5\">10.1007/s12666-026-03846-5</a>."},"project":[{"name":"TRR 285 - Project Area C","_id":"133"},{"_id":"147","name":"TRR 285 - Subproject C03"},{"_id":"130","name":"TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten"}],"_id":"66067","publisher":"Springer Science and Business Media LLC","volume":79,"user_id":"88725","status":"public"},{"language":[{"iso":"eng"}],"main_file_link":[{"url":"https://doi.org/10.1515/auto-2024-0112","open_access":"1"}],"doi":"10.1515/auto-2024-0112","author":[{"first_name":"Henning","last_name":"Peters","full_name":"Peters, Henning"},{"full_name":"Mazur, Andreas","last_name":"Mazur","first_name":"Andreas"},{"first_name":"Ankit Kumar","last_name":"Pandey","full_name":"Pandey, Ankit Kumar"},{"id":"552","first_name":"Ansgar","last_name":"Trächtler","full_name":"Trächtler, Ansgar"},{"full_name":"Hammer, Barbara","first_name":"Barbara","last_name":"Hammer"},{"full_name":"Homberg, Werner","last_name":"Homberg","first_name":"Werner","id":"233"}],"publication_identifier":{"issn":["0178-2312","2196-677X"]},"year":"2025","title":"Development of a digital twin for data-driven modeling of punch-bending processes using a graphical modeling notation","intvolume":"        73","publication_status":"published","date_updated":"2025-10-30T12:49:49Z","date_created":"2025-10-08T16:10:34Z","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"type":"journal_article","publication":"at - Automatisierungstechnik","issue":"3","abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>In punch-bending, products such as brackets, electronic contacts or spring elements are produced from wire-shaped semi-finished products using separation processes and several successive forming processes. Within the multi-stage straightening and bending processes, cross-stage and quantity-dependent effects have a significant influence on the quality of the end product. In order to optimize the punch-bending process with regard to the resulting component deviations and waste rate, this article presents the concept of a digital twin for an innovative hybrid model of a multi-stage punch-bending process. To ensure efficient development and implementation of the digital twin, the graphical modeling notation DSL4DPiFS is used for additional support. It makes it possible to derive the required interfaces of the Asset Administration Shell of the hybrid data-driven model.</jats:p>","lang":"eng"}],"publisher":"Walter de Gruyter GmbH","_id":"61762","page":"173-184","volume":73,"user_id":"82875","status":"public","oa":"1","citation":{"chicago":"Peters, Henning, Andreas Mazur, Ankit Kumar Pandey, Ansgar Trächtler, Barbara Hammer, and Werner Homberg. “Development of a Digital Twin for Data-Driven Modeling of Punch-Bending Processes Using a Graphical Modeling Notation.” <i>At - Automatisierungstechnik</i> 73, no. 3 (2025): 173–84. <a href=\"https://doi.org/10.1515/auto-2024-0112\">https://doi.org/10.1515/auto-2024-0112</a>.","short":"H. Peters, A. Mazur, A.K. Pandey, A. Trächtler, B. Hammer, W. Homberg, At - Automatisierungstechnik 73 (2025) 173–184.","ieee":"H. Peters, A. Mazur, A. K. Pandey, A. Trächtler, B. Hammer, and W. Homberg, “Development of a digital twin for data-driven modeling of punch-bending processes using a graphical modeling notation,” <i>at - Automatisierungstechnik</i>, vol. 73, no. 3, pp. 173–184, 2025, doi: <a href=\"https://doi.org/10.1515/auto-2024-0112\">10.1515/auto-2024-0112</a>.","apa":"Peters, H., Mazur, A., Pandey, A. K., Trächtler, A., Hammer, B., &#38; Homberg, W. (2025). Development of a digital twin for data-driven modeling of punch-bending processes using a graphical modeling notation. <i>At - Automatisierungstechnik</i>, <i>73</i>(3), 173–184. <a href=\"https://doi.org/10.1515/auto-2024-0112\">https://doi.org/10.1515/auto-2024-0112</a>","bibtex":"@article{Peters_Mazur_Pandey_Trächtler_Hammer_Homberg_2025, title={Development of a digital twin for data-driven modeling of punch-bending processes using a graphical modeling notation}, volume={73}, DOI={<a href=\"https://doi.org/10.1515/auto-2024-0112\">10.1515/auto-2024-0112</a>}, number={3}, journal={at - Automatisierungstechnik}, publisher={Walter de Gruyter GmbH}, author={Peters, Henning and Mazur, Andreas and Pandey, Ankit Kumar and Trächtler, Ansgar and Hammer, Barbara and Homberg, Werner}, year={2025}, pages={173–184} }","ama":"Peters H, Mazur A, Pandey AK, Trächtler A, Hammer B, Homberg W. Development of a digital twin for data-driven modeling of punch-bending processes using a graphical modeling notation. <i>at - Automatisierungstechnik</i>. 2025;73(3):173-184. doi:<a href=\"https://doi.org/10.1515/auto-2024-0112\">10.1515/auto-2024-0112</a>","mla":"Peters, Henning, et al. “Development of a Digital Twin for Data-Driven Modeling of Punch-Bending Processes Using a Graphical Modeling Notation.” <i>At - Automatisierungstechnik</i>, vol. 73, no. 3, Walter de Gruyter GmbH, 2025, pp. 173–84, doi:<a href=\"https://doi.org/10.1515/auto-2024-0112\">10.1515/auto-2024-0112</a>."}},{"department":[{"_id":"156"},{"_id":"153"},{"_id":"241"}],"keyword":["Flow Forming","Thermomechanical Forming","α’-Martensite","Property Control"],"type":"conference","date_created":"2025-05-15T06:59:28Z","abstract":[{"text":"<jats:p>Abstract. Flow forming is recognized for its precision in producing rotationally symmetric components, but the use of metastable austenitic stainless steel (AISI 304L) introduces challenges due to uncontrolled strain-induced α’ martensite formation. Variations in factors such as eccentricity and batch inconsistencies lead to unpredictable microstructural profiles, limiting reproducibility [1,2]. This study addresses these issues by incorporating thermal actuators for cryogenic cooling and induction heating to regulate forming temperatures, enabling control of the α’-martensite content. Experimental investigations demonstrate that local tempering during thermomechanical reverse flow forming produces discernible variations in microstructure, affecting mechanical and magnetic properties [3]. Controlled local adjustments of α’-martensite content allow for customization of properties in seamless tubes, advancing manufacturing capabilities for complex, defect-free components. The results presented demonstrate promising strategies for implementation within the context of closed-loop property control in flow forming.</jats:p>","lang":"eng"}],"publication":"Materials Research Proceedings","doi":"10.21741/9781644903599-127","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://mrforum.com/product/9781644903599-127/"}],"intvolume":"        54","publication_status":"published","date_updated":"2025-10-30T13:55:08Z","author":[{"id":"36287","last_name":"Arian","first_name":"Bahman","full_name":"Arian, Bahman"},{"id":"233","full_name":"Homberg, Werner","last_name":"Homberg","first_name":"Werner"},{"last_name":"Kersting","first_name":"Lukas","full_name":"Kersting, Lukas"},{"last_name":"Trächtler","first_name":"Ansgar","full_name":"Trächtler, Ansgar","id":"552"},{"full_name":"Rozo Vasquez, Julian","first_name":"Julian","last_name":"Rozo Vasquez"},{"last_name":"Walther","first_name":"Frank","full_name":"Walther, Frank"}],"publication_identifier":{"issn":["2474-395X"]},"title":"Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties","year":"2025","oa":"1","quality_controlled":"1","citation":{"bibtex":"@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2025, title={Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties}, volume={54}, DOI={<a href=\"https://doi.org/10.21741/9781644903599-127\">10.21741/9781644903599-127</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler, Ansgar and Rozo Vasquez, Julian and Walther, Frank}, editor={Carlone, Pierpaolo and Filice, Luigino and Umbrello, Domenico}, year={2025} }","ama":"Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties. In: Carlone P, Filice L, Umbrello D, eds. <i>Materials Research Proceedings</i>. Vol 54. Materials Research Forum LLC; 2025. doi:<a href=\"https://doi.org/10.21741/9781644903599-127\">10.21741/9781644903599-127</a>","mla":"Arian, Bahman, et al. “Advanced Thermomechanical Flow Forming: A Novel Approach to α’-Martensite Control for Enhanced Material Properties.” <i>Materials Research Proceedings</i>, edited by Pierpaolo Carlone et al., vol. 54, Materials Research Forum LLC, 2025, doi:<a href=\"https://doi.org/10.21741/9781644903599-127\">10.21741/9781644903599-127</a>.","chicago":"Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian Rozo Vasquez, and Frank Walther. “Advanced Thermomechanical Flow Forming: A Novel Approach to α’-Martensite Control for Enhanced Material Properties.” In <i>Materials Research Proceedings</i>, edited by Pierpaolo Carlone, Luigino Filice, and Domenico Umbrello, Vol. 54. Materials Research Forum LLC, 2025. <a href=\"https://doi.org/10.21741/9781644903599-127\">https://doi.org/10.21741/9781644903599-127</a>.","short":"B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther, in: P. Carlone, L. Filice, D. Umbrello (Eds.), Materials Research Proceedings, Materials Research Forum LLC, 2025.","ieee":"B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F. Walther, “Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties,” in <i>Materials Research Proceedings</i>, Paestum, Italy, 2025, vol. 54, doi: <a href=\"https://doi.org/10.21741/9781644903599-127\">10.21741/9781644903599-127</a>.","apa":"Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., &#38; Walther, F. (2025). Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties. In P. Carlone, L. Filice, &#38; D. Umbrello (Eds.), <i>Materials Research Proceedings</i> (Vol. 54). Materials Research Forum LLC. <a href=\"https://doi.org/10.21741/9781644903599-127\">https://doi.org/10.21741/9781644903599-127</a>"},"volume":54,"editor":[{"last_name":"Carlone","first_name":"Pierpaolo","full_name":"Carlone, Pierpaolo"},{"first_name":"Luigino","last_name":"Filice","full_name":"Filice, Luigino"},{"first_name":"Domenico","last_name":"Umbrello","full_name":"Umbrello, Domenico"}],"user_id":"36287","publisher":"Materials Research Forum LLC","_id":"59907","has_accepted_license":"1","conference":{"start_date":"2025-05-06","name":"The 28th International ESAFORM Conference on Material Forming - ESAFORM 2025","location":"Paestum, Italy","end_date":"2025-05-09"},"status":"public"},{"status":"public","volume":62,"user_id":"82875","publisher":"Walter de Gruyter GmbH","_id":"62024","page":"617-633","citation":{"bibtex":"@article{Rozo Vasquez_Tappe_Arian_Kersting_Homberg_Trächtler_Walther_2025, title={Magneto-optical Kerr effect analysis of strain-induced martensite formation during flow forming of metastable austenitic steel AISI 304L}, volume={62}, DOI={<a href=\"https://doi.org/10.1515/pm-2025-0059\">10.1515/pm-2025-0059</a>}, number={9–10}, journal={Practical Metallography}, publisher={Walter de Gruyter GmbH}, author={Rozo Vasquez, Julian and Tappe, Jan and Arian, Bahman and Kersting, Lukas and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2025}, pages={617–633} }","ama":"Rozo Vasquez J, Tappe J, Arian B, et al. Magneto-optical Kerr effect analysis of strain-induced martensite formation during flow forming of metastable austenitic steel AISI 304L. <i>Practical Metallography</i>. 2025;62(9-10):617-633. doi:<a href=\"https://doi.org/10.1515/pm-2025-0059\">10.1515/pm-2025-0059</a>","mla":"Rozo Vasquez, Julian, et al. “Magneto-Optical Kerr Effect Analysis of Strain-Induced Martensite Formation during Flow Forming of Metastable Austenitic Steel AISI 304L.” <i>Practical Metallography</i>, vol. 62, no. 9–10, Walter de Gruyter GmbH, 2025, pp. 617–33, doi:<a href=\"https://doi.org/10.1515/pm-2025-0059\">10.1515/pm-2025-0059</a>.","chicago":"Rozo Vasquez, Julian, Jan Tappe, Bahman Arian, Lukas Kersting, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Magneto-Optical Kerr Effect Analysis of Strain-Induced Martensite Formation during Flow Forming of Metastable Austenitic Steel AISI 304L.” <i>Practical Metallography</i> 62, no. 9–10 (2025): 617–33. <a href=\"https://doi.org/10.1515/pm-2025-0059\">https://doi.org/10.1515/pm-2025-0059</a>.","short":"J. Rozo Vasquez, J. Tappe, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, Practical Metallography 62 (2025) 617–633.","ieee":"J. Rozo Vasquez <i>et al.</i>, “Magneto-optical Kerr effect analysis of strain-induced martensite formation during flow forming of metastable austenitic steel AISI 304L,” <i>Practical Metallography</i>, vol. 62, no. 9–10, pp. 617–633, 2025, doi: <a href=\"https://doi.org/10.1515/pm-2025-0059\">10.1515/pm-2025-0059</a>.","apa":"Rozo Vasquez, J., Tappe, J., Arian, B., Kersting, L., Homberg, W., Trächtler, A., &#38; Walther, F. (2025). Magneto-optical Kerr effect analysis of strain-induced martensite formation during flow forming of metastable austenitic steel AISI 304L. <i>Practical Metallography</i>, <i>62</i>(9–10), 617–633. <a href=\"https://doi.org/10.1515/pm-2025-0059\">https://doi.org/10.1515/pm-2025-0059</a>"},"oa":"1","intvolume":"        62","publication_status":"published","date_updated":"2025-10-30T12:54:17Z","author":[{"first_name":"Julian","last_name":"Rozo Vasquez","full_name":"Rozo Vasquez, Julian"},{"last_name":"Tappe","first_name":"Jan","full_name":"Tappe, Jan"},{"full_name":"Arian, Bahman","last_name":"Arian","first_name":"Bahman","id":"36287"},{"full_name":"Kersting, Lukas","first_name":"Lukas","last_name":"Kersting"},{"id":"233","last_name":"Homberg","first_name":"Werner","full_name":"Homberg, Werner"},{"id":"552","full_name":"Trächtler, Ansgar","last_name":"Trächtler","first_name":"Ansgar"},{"full_name":"Walther, Frank","last_name":"Walther","first_name":"Frank"}],"publication_identifier":{"issn":["2195-8599","0032-678X"]},"year":"2025","title":"Magneto-optical Kerr effect analysis of strain-induced martensite formation during flow forming of metastable austenitic steel AISI 304L","doi":"10.1515/pm-2025-0059","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1515/pm-2025-0059"}],"abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>This paper presents a characterization of the microstructural evolution and its correlation with the magnetic structure due to flow forming of semi-finished tubes of austenitic stainless steel AISI 304L. The plastic deformation triggers a phase transformation of the metastable austenite into α’-martensite.</jats:p>\r\n               <jats:p>Depending on the combination of production parameters, different fractions of strain-induced α’-martensite were measured by means non-destructive micromagnetic techniques and correlated with the evolution of hardness and the microstructure using electron backscatter diffraction analyses. The magneto-optical Kerr effect analysis was used as a tool to perform a qualitative analysis of the evolution of the magnetic domain structure correlated with the formation of α’-martensite. An analysis of these data allowed to derive surface magnetization hysteresis loops that were compared with integral hysteresis loops of the specimens. It was proven by both methods that the formation of martensite increases the magnetic energy and the spontaneous magnetization of the specimens. The results of this investigation contribute to a better understanding of micromagnetic sensors to monitor and control the formation of α’-martensite in a flow forming. Furthermore, various techniques have demonstrated the evolution of the magnetic properties of the material, which can be applied in applications for invisible coding of workpieces.</jats:p>"}],"publication":"Practical Metallography","issue":"9-10","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"type":"journal_article","date_created":"2025-10-30T12:22:54Z"},{"publication":"Materials Research Proceedings","abstract":[{"text":"<jats:p>Abstract. The incremental flow forming process features a large number of process parameter combinations that can be varied from pass to pass or during a pass. In the future however, a more efficient utilization of this large number of process parameter combinations and a compensation of process disturbances could be required. This is due to a rising demand for increasing the part complexity, e.g. by graded property structures or a more complex geometry. In this context, innovative approaches like closed-loop property control and optimal control are advantageous, but require fast process models of flow forming that are not state of the art. This paper thus proposes a new modelling approach of multi-pass flow forming especially taking the transfer behavior between process parameters and wall thickness evolution from pass to pass into focus. A hybrid modelling approach is developed that combines knowledge about the incremental process character with empirical data regression to a basic analytic relation. The basic relation is further extended by a multi-layer neural network to enhance the overall model accuracy. This hybrid modelling approach is finally validated using experimental data. Thus, it is shown that a suitable model structure was found in context of a future closed-loop control or optimal control for multi-pass flow forming.</jats:p>","lang":"eng"}],"date_created":"2025-10-30T12:16:37Z","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"type":"conference","author":[{"full_name":"Kersting, Lukas","last_name":"Kersting","first_name":"Lukas"},{"first_name":"Sharin Kumar","last_name":"Gunasagran","full_name":"Gunasagran, Sharin Kumar"},{"full_name":"Arian, Bahman","last_name":"Arian","first_name":"Bahman","id":"36287"},{"full_name":"Rozo Vaszquez, Julian","last_name":"Rozo Vaszquez","first_name":"Julian"},{"id":"552","full_name":"Trächtler, Ansgar","last_name":"Trächtler","first_name":"Ansgar"},{"id":"233","first_name":"Werner","last_name":"Homberg","full_name":"Homberg, Werner"},{"first_name":"Frank","last_name":"Walther","full_name":"Walther, Frank"}],"publication_identifier":{"issn":["2474-395X"]},"year":"2025","title":"Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based model","intvolume":"        54","date_updated":"2025-10-30T12:53:36Z","publication_status":"published","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://doi.org/10.21741/9781644903599-140 ","open_access":"1"}],"doi":"10.21741/9781644903599-140","citation":{"chicago":"Kersting, Lukas, Sharin Kumar Gunasagran, Bahman Arian, Julian Rozo Vaszquez, Ansgar Trächtler, Werner Homberg, and Frank Walther. “Real-Time Modelling of Incremental Multi-Pass Flow Forming by a Hybrid, Data-Based Model.” In <i>Materials Research Proceedings</i>, Vol. 54. Materials Research Forum LLC, 2025. <a href=\"https://doi.org/10.21741/9781644903599-140\">https://doi.org/10.21741/9781644903599-140</a>.","ama":"Kersting L, Gunasagran SK, Arian B, et al. Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based model. In: <i>Materials Research Proceedings</i>. Vol 54. Materials Research Forum LLC; 2025. doi:<a href=\"https://doi.org/10.21741/9781644903599-140\">10.21741/9781644903599-140</a>","short":"L. Kersting, S.K. Gunasagran, B. Arian, J. Rozo Vaszquez, A. Trächtler, W. Homberg, F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC, 2025.","bibtex":"@inproceedings{Kersting_Gunasagran_Arian_Rozo Vaszquez_Trächtler_Homberg_Walther_2025, title={Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based model}, volume={54}, DOI={<a href=\"https://doi.org/10.21741/9781644903599-140\">10.21741/9781644903599-140</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Kersting, Lukas and Gunasagran, Sharin Kumar and Arian, Bahman and Rozo Vaszquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}, year={2025} }","apa":"Kersting, L., Gunasagran, S. K., Arian, B., Rozo Vaszquez, J., Trächtler, A., Homberg, W., &#38; Walther, F. (2025). Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based model. <i>Materials Research Proceedings</i>, <i>54</i>. <a href=\"https://doi.org/10.21741/9781644903599-140\">https://doi.org/10.21741/9781644903599-140</a>","mla":"Kersting, Lukas, et al. “Real-Time Modelling of Incremental Multi-Pass Flow Forming by a Hybrid, Data-Based Model.” <i>Materials Research Proceedings</i>, vol. 54, Materials Research Forum LLC, 2025, doi:<a href=\"https://doi.org/10.21741/9781644903599-140\">10.21741/9781644903599-140</a>.","ieee":"L. Kersting <i>et al.</i>, “Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based model,” in <i>Materials Research Proceedings</i>, 2025, vol. 54, doi: <a href=\"https://doi.org/10.21741/9781644903599-140\">10.21741/9781644903599-140</a>."},"oa":"1","status":"public","publisher":"Materials Research Forum LLC","_id":"62022","volume":54,"user_id":"82875"},{"doi":"10.1515/auto-2024-0127","main_file_link":[{"url":"https://doi.org/10.1515/auto-2024-0127 ","open_access":"1"}],"language":[{"iso":"eng"}],"date_updated":"2025-10-30T12:53:56Z","publication_status":"published","intvolume":"        73","year":"2025","title":"Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler Austenite","publication_identifier":{"issn":["0178-2312","2196-677X"]},"author":[{"full_name":"Kersting, Lukas","last_name":"Kersting","first_name":"Lukas"},{"full_name":"Arian, Bahman","first_name":"Bahman","last_name":"Arian","id":"36287"},{"last_name":"Rozo Vasquez","first_name":"Julian","full_name":"Rozo Vasquez, Julian"},{"first_name":"Ansgar","last_name":"Trächtler","full_name":"Trächtler, Ansgar","id":"552"},{"id":"233","last_name":"Homberg","first_name":"Werner","full_name":"Homberg, Werner"},{"full_name":"Walther, Frank","first_name":"Frank","last_name":"Walther"}],"type":"journal_article","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"date_created":"2025-10-30T12:21:42Z","abstract":[{"lang":"eng","text":"<jats:title>Zusammenfassung</jats:title>\r\n               <jats:p>Die Eigenschaftsregelung mit einer online-Messung der Bauteileigenschaften ist ein in der Umformtechnik viel diskutiertes, aber kaum validiertes Konzept, um den Automatisierungsgrad bei der Bauteilfertigung weiter zu erhöhen. Dieser Artikel soll helfen, die Lücke beispielhaft für den Fertigungsprozess des Drückwalzens metastabiler Austenite zu schließen. Der metastabile austenitische Edelstahl ändert hierbei während der Verformung seinen α′-Martensitgehalt und damit verbunden die magnetischen Eigenschaften. Deshalb soll über die Regelung das definierte Einstellen des α′-Martensitgehaltes möglich werden. Im Rahmen des vorliegenden Artikels wird gezeigt, wie mittels des modellbasierten Entwurfs die Eigenschaftsregelung ausgelegt und parametriert werden kann. Zudem beinhaltet der Artikel experimentelle Validierungsergebnisse der zuvor entworfenen Eigenschaftsregelung.</jats:p>"}],"publication":"at - Automatisierungstechnik","issue":"7","user_id":"82875","volume":73,"page":"527-540","publisher":"Walter de Gruyter GmbH","_id":"62023","status":"public","oa":"1","citation":{"mla":"Kersting, Lukas, et al. “Modellbasierter Entwurf Und Validierung Einer Eigenschaftsregelung Für Das Drückwalzen Metastabiler Austenite.” <i>At - Automatisierungstechnik</i>, vol. 73, no. 7, Walter de Gruyter GmbH, 2025, pp. 527–40, doi:<a href=\"https://doi.org/10.1515/auto-2024-0127\">10.1515/auto-2024-0127</a>.","bibtex":"@article{Kersting_Arian_Rozo Vasquez_Trächtler_Homberg_Walther_2025, title={Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler Austenite}, volume={73}, DOI={<a href=\"https://doi.org/10.1515/auto-2024-0127\">10.1515/auto-2024-0127</a>}, number={7}, journal={at - Automatisierungstechnik}, publisher={Walter de Gruyter GmbH}, author={Kersting, Lukas and Arian, Bahman and Rozo Vasquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}, year={2025}, pages={527–540} }","ama":"Kersting L, Arian B, Rozo Vasquez J, Trächtler A, Homberg W, Walther F. Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler Austenite. <i>at - Automatisierungstechnik</i>. 2025;73(7):527-540. doi:<a href=\"https://doi.org/10.1515/auto-2024-0127\">10.1515/auto-2024-0127</a>","ieee":"L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, and F. Walther, “Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler Austenite,” <i>at - Automatisierungstechnik</i>, vol. 73, no. 7, pp. 527–540, 2025, doi: <a href=\"https://doi.org/10.1515/auto-2024-0127\">10.1515/auto-2024-0127</a>.","apa":"Kersting, L., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., &#38; Walther, F. (2025). Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler Austenite. <i>At - Automatisierungstechnik</i>, <i>73</i>(7), 527–540. <a href=\"https://doi.org/10.1515/auto-2024-0127\">https://doi.org/10.1515/auto-2024-0127</a>","short":"L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, F. Walther, At - Automatisierungstechnik 73 (2025) 527–540.","chicago":"Kersting, Lukas, Bahman Arian, Julian Rozo Vasquez, Ansgar Trächtler, Werner Homberg, and Frank Walther. “Modellbasierter Entwurf Und Validierung Einer Eigenschaftsregelung Für Das Drückwalzen Metastabiler Austenite.” <i>At - Automatisierungstechnik</i> 73, no. 7 (2025): 527–40. <a href=\"https://doi.org/10.1515/auto-2024-0127\">https://doi.org/10.1515/auto-2024-0127</a>."}},{"citation":{"bibtex":"@article{Kersting_Arian_Rozo Vasquez_Trächtler_Homberg_Walther_2025, title={State-space modelling approach for control and observer design in property-controlled reverse flow forming}, volume={59}, DOI={<a href=\"https://doi.org/10.1016/j.ifacol.2025.03.020\">10.1016/j.ifacol.2025.03.020</a>}, number={1}, journal={IFAC-PapersOnLine}, publisher={Elsevier BV}, author={Kersting, Lukas and Arian, Bahman and Rozo Vasquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}, year={2025}, pages={109–114} }","ama":"Kersting L, Arian B, Rozo Vasquez J, Trächtler A, Homberg W, Walther F. State-space modelling approach for control and observer design in property-controlled reverse flow forming. <i>IFAC-PapersOnLine</i>. 2025;59(1):109-114. doi:<a href=\"https://doi.org/10.1016/j.ifacol.2025.03.020\">10.1016/j.ifacol.2025.03.020</a>","mla":"Kersting, Lukas, et al. “State-Space Modelling Approach for Control and Observer Design in Property-Controlled Reverse Flow Forming.” <i>IFAC-PapersOnLine</i>, vol. 59, no. 1, Elsevier BV, 2025, pp. 109–14, doi:<a href=\"https://doi.org/10.1016/j.ifacol.2025.03.020\">10.1016/j.ifacol.2025.03.020</a>.","short":"L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, F. Walther, IFAC-PapersOnLine 59 (2025) 109–114.","chicago":"Kersting, Lukas, Bahman Arian, Julian Rozo Vasquez, Ansgar Trächtler, Werner Homberg, and Frank Walther. “State-Space Modelling Approach for Control and Observer Design in Property-Controlled Reverse Flow Forming.” <i>IFAC-PapersOnLine</i> 59, no. 1 (2025): 109–14. <a href=\"https://doi.org/10.1016/j.ifacol.2025.03.020\">https://doi.org/10.1016/j.ifacol.2025.03.020</a>.","ieee":"L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, and F. Walther, “State-space modelling approach for control and observer design in property-controlled reverse flow forming,” <i>IFAC-PapersOnLine</i>, vol. 59, no. 1, pp. 109–114, 2025, doi: <a href=\"https://doi.org/10.1016/j.ifacol.2025.03.020\">10.1016/j.ifacol.2025.03.020</a>.","apa":"Kersting, L., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., &#38; Walther, F. (2025). State-space modelling approach for control and observer design in property-controlled reverse flow forming. <i>IFAC-PapersOnLine</i>, <i>59</i>(1), 109–114. <a href=\"https://doi.org/10.1016/j.ifacol.2025.03.020\">https://doi.org/10.1016/j.ifacol.2025.03.020</a>"},"oa":"1","status":"public","volume":59,"user_id":"82875","publisher":"Elsevier BV","_id":"62021","page":"109-114","issue":"1","publication":"IFAC-PapersOnLine","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"type":"journal_article","date_created":"2025-10-30T12:14:01Z","intvolume":"        59","publication_status":"published","date_updated":"2025-10-30T12:53:16Z","author":[{"first_name":"Lukas","last_name":"Kersting","full_name":"Kersting, Lukas"},{"id":"36287","full_name":"Arian, Bahman","first_name":"Bahman","last_name":"Arian"},{"last_name":"Rozo Vasquez","first_name":"Julian","full_name":"Rozo Vasquez, Julian"},{"first_name":"Ansgar","last_name":"Trächtler","full_name":"Trächtler, Ansgar","id":"552"},{"last_name":"Homberg","first_name":"Werner","full_name":"Homberg, Werner","id":"233"},{"last_name":"Walther","first_name":"Frank","full_name":"Walther, Frank"}],"publication_identifier":{"issn":["2405-8963"]},"year":"2025","title":"State-space modelling approach for control and observer design in property-controlled reverse flow forming","doi":"10.1016/j.ifacol.2025.03.020","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1016/j.ifacol.2025.03.020 "}]},{"abstract":[{"text":"<jats:p>Friction-spinning is an incremental thermomechanical forming process that has huge potential due to its simple yet effective mechanism of utilising friction between a rotating workpiece and a forming tool to increase the workpiece’s temperature, which reduces the required forces and increases formability during the forming process. Despite the simplicity of the process’s setup, the thermomechanical loads and high relative velocities involved, especially in the contact zone, make the application of classical methods for characterising friction inaccurate. It is therefore essential to find a way to describe the frictional behaviour under real process conditions to be able to gain a holistic understanding of the process and the effect of the adjustable parameters on the outcome, especially the temperature. To achieve this goal, an experimental setup that considers the actual process boundary conditions in forming tubes made of EN AW-6060 was used to measure in situ normal and frictional forces, in addition to process temperatures, under varying rotational speed and feed rate values.</jats:p>","lang":"eng"}],"issue":"9","publication":"Journal of Manufacturing and Materials Processing","type":"journal_article","department":[{"_id":"156"}],"date_created":"2025-12-19T10:05:03Z","date_updated":"2025-12-22T10:39:34Z","publication_status":"published","intvolume":"         9","year":"2025","title":"In Situ Investigation of the Frictional Behaviour in Friction-Spinning","author":[{"full_name":"Wiens, Eugen","first_name":"Eugen","last_name":"Wiens","id":"7888"},{"first_name":"Dina","last_name":"Hijazi","full_name":"Hijazi, Dina"},{"full_name":"Jüttner, Maik","last_name":"Jüttner","first_name":"Maik"},{"id":"233","full_name":"Homberg, Werner","first_name":"Werner","last_name":"Homberg"},{"full_name":"Kensy, Mark Dennis","last_name":"Kensy","first_name":"Mark Dennis"},{"last_name":"Tillmann","first_name":"Wolfgang","full_name":"Tillmann, Wolfgang"}],"publication_identifier":{"issn":["2504-4494"]},"doi":"10.3390/jmmp9090302","article_number":"302","language":[{"iso":"eng"}],"quality_controlled":"1","citation":{"ieee":"E. Wiens, D. Hijazi, M. Jüttner, W. Homberg, M. D. Kensy, and W. Tillmann, “In Situ Investigation of the Frictional Behaviour in Friction-Spinning,” <i>Journal of Manufacturing and Materials Processing</i>, vol. 9, no. 9, Art. no. 302, 2025, doi: <a href=\"https://doi.org/10.3390/jmmp9090302\">10.3390/jmmp9090302</a>.","apa":"Wiens, E., Hijazi, D., Jüttner, M., Homberg, W., Kensy, M. D., &#38; Tillmann, W. (2025). In Situ Investigation of the Frictional Behaviour in Friction-Spinning. <i>Journal of Manufacturing and Materials Processing</i>, <i>9</i>(9), Article 302. <a href=\"https://doi.org/10.3390/jmmp9090302\">https://doi.org/10.3390/jmmp9090302</a>","short":"E. Wiens, D. Hijazi, M. Jüttner, W. Homberg, M.D. Kensy, W. Tillmann, Journal of Manufacturing and Materials Processing 9 (2025).","chicago":"Wiens, Eugen, Dina Hijazi, Maik Jüttner, Werner Homberg, Mark Dennis Kensy, and Wolfgang Tillmann. “In Situ Investigation of the Frictional Behaviour in Friction-Spinning.” <i>Journal of Manufacturing and Materials Processing</i> 9, no. 9 (2025). <a href=\"https://doi.org/10.3390/jmmp9090302\">https://doi.org/10.3390/jmmp9090302</a>.","mla":"Wiens, Eugen, et al. “In Situ Investigation of the Frictional Behaviour in Friction-Spinning.” <i>Journal of Manufacturing and Materials Processing</i>, vol. 9, no. 9, 302, MDPI AG, 2025, doi:<a href=\"https://doi.org/10.3390/jmmp9090302\">10.3390/jmmp9090302</a>.","bibtex":"@article{Wiens_Hijazi_Jüttner_Homberg_Kensy_Tillmann_2025, title={In Situ Investigation of the Frictional Behaviour in Friction-Spinning}, volume={9}, DOI={<a href=\"https://doi.org/10.3390/jmmp9090302\">10.3390/jmmp9090302</a>}, number={9302}, journal={Journal of Manufacturing and Materials Processing}, publisher={MDPI AG}, author={Wiens, Eugen and Hijazi, Dina and Jüttner, Maik and Homberg, Werner and Kensy, Mark Dennis and Tillmann, Wolfgang}, year={2025} }","ama":"Wiens E, Hijazi D, Jüttner M, Homberg W, Kensy MD, Tillmann W. In Situ Investigation of the Frictional Behaviour in Friction-Spinning. <i>Journal of Manufacturing and Materials Processing</i>. 2025;9(9). doi:<a href=\"https://doi.org/10.3390/jmmp9090302\">10.3390/jmmp9090302</a>"},"status":"public","user_id":"7888","volume":9,"_id":"63347","publisher":"MDPI AG"},{"title":"Intrinsic lubrication: A new approach in the context of the deep drawing process","year":"2025","author":[{"id":"79551","first_name":"Ermir","last_name":"Cakici","full_name":"Cakici, Ermir"},{"last_name":"Homberg","first_name":"Werner","full_name":"Homberg, Werner","id":"233"}],"publication_identifier":{"issn":["2474-395X"]},"publication_status":"published","date_updated":"2026-04-16T08:33:32Z","intvolume":"        54","main_file_link":[{"url":"https://mrforum.com/product/9781644903599-122/"}],"language":[{"iso":"eng"}],"doi":"10.21741/9781644903599-122","publication":"Materials Research Proceedings","abstract":[{"text":"<jats:p>Abstract. This study presents intrinsic lubrication as a novel approach to deep drawing processes, using additively manufactured, lubricant-permeable tools to minimize lubricant consumption and improve efficiency. Two systems were evaluated: a passive system based on capillary action and gravity, and an active system using pumped delivery for precise, on-demand application. Experimental tests were conducted on micro-bores (0.2-0.5 mm) to demonstrate their suitability for lubricant transport. Smaller bores have excellent capillary action but are prone to clogging, while larger bores offer higher permeability. The passive system is resource-efficient but requires adjustments to counteract gravitational asymmetry. The active system provides consistent lubricant distribution but is more complex. These findings provide a basis for optimizing intrinsic lubrication systems.</jats:p>","lang":"eng"}],"date_created":"2025-05-14T08:53:41Z","type":"conference","department":[{"_id":"156"},{"_id":"321"}],"status":"public","conference":{"location":"Paestum, Italien","name":"The 28th International ESAFORM Conference on Material Forming - ESAFORM 2025","start_date":"2025-05-07","end_date":"2025-05-09"},"_id":"59894","publisher":"Materials Research Forum LLC","user_id":"79551","volume":54,"citation":{"ieee":"E. Cakici and W. Homberg, “Intrinsic lubrication: A new approach in the context of the deep drawing process,” in <i>Materials Research Proceedings</i>, Paestum, Italien, 2025, vol. 54, doi: <a href=\"https://doi.org/10.21741/9781644903599-122\">10.21741/9781644903599-122</a>.","apa":"Cakici, E., &#38; Homberg, W. (2025). Intrinsic lubrication: A new approach in the context of the deep drawing process. <i>Materials Research Proceedings</i>, <i>54</i>. <a href=\"https://doi.org/10.21741/9781644903599-122\">https://doi.org/10.21741/9781644903599-122</a>","chicago":"Cakici, Ermir, and Werner Homberg. “Intrinsic Lubrication: A New Approach in the Context of the Deep Drawing Process.” In <i>Materials Research Proceedings</i>, Vol. 54. Materials Research Forum LLC, 2025. <a href=\"https://doi.org/10.21741/9781644903599-122\">https://doi.org/10.21741/9781644903599-122</a>.","short":"E. Cakici, W. Homberg, in: Materials Research Proceedings, Materials Research Forum LLC, 2025.","mla":"Cakici, Ermir, and Werner Homberg. “Intrinsic Lubrication: A New Approach in the Context of the Deep Drawing Process.” <i>Materials Research Proceedings</i>, vol. 54, Materials Research Forum LLC, 2025, doi:<a href=\"https://doi.org/10.21741/9781644903599-122\">10.21741/9781644903599-122</a>.","bibtex":"@inproceedings{Cakici_Homberg_2025, title={Intrinsic lubrication: A new approach in the context of the deep drawing process}, volume={54}, DOI={<a href=\"https://doi.org/10.21741/9781644903599-122\">10.21741/9781644903599-122</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Cakici, Ermir and Homberg, Werner}, year={2025} }","ama":"Cakici E, Homberg W. Intrinsic lubrication: A new approach in the context of the deep drawing process. In: <i>Materials Research Proceedings</i>. Vol 54. Materials Research Forum LLC; 2025. doi:<a href=\"https://doi.org/10.21741/9781644903599-122\">10.21741/9781644903599-122</a>"},"quality_controlled":"1"},{"volume":54,"user_id":"106786","doi":"10.21741/9781644903599-272","publisher":"Materials Research Forum LLC","_id":"65706","language":[{"iso":"eng"}],"intvolume":"        54","publication_status":"published","date_updated":"2026-05-27T17:57:23Z","author":[{"id":"106786","full_name":"Gabsa, Steffen","last_name":"Gabsa","first_name":"Steffen"},{"full_name":"Homberg, Werner","first_name":"Werner","last_name":"Homberg","id":"233"},{"first_name":"Timothy","last_name":"Goller","full_name":"Goller, Timothy"},{"id":"88725","full_name":"Nordieker, Ansgar Bernhard","last_name":"Nordieker","first_name":"Ansgar Bernhard"},{"id":"194","full_name":"Grundmeier, Guido","last_name":"Grundmeier","first_name":"Guido"}],"publication_identifier":{"issn":["2474-395X"]},"status":"public","year":"2025","title":"Influence of different oxide thicknesses on the friction induced and continuous solid-state recycling of aluminum scrap","department":[{"_id":"9"},{"_id":"156"},{"_id":"321"}],"type":"conference","date_created":"2026-05-27T17:53:28Z","abstract":[{"lang":"eng","text":"<jats:p>Abstract. Saving emissions and a circular economy are key aspects of sustainable production and compliance global climate change targets. Friction-induced solid-state recycling of aluminum scrap to production endless semi-finished products. Scrap is fed into a continuously rotating wheel. This requires less energy compared to heat-based recycling processes. Different sizes, shapes and surfaces of chips can be used as starting material in the process. The influence of this has been shown in past publications. A native oxide layer is a fixed component of aluminum surface. This layer is broken up during the forming process, allowing the aluminum to bond. In addition to the geometry, the surface finishes and the thickness of the oxide layer are therefore also important input variables in friction-induced solid-state recycling. The oxide layers on the chips were determined for the investigation. In addition, different layer thicknesses were produced to survey their influence. The resulting semi-finished products were evaluated on the basis of their tensile strength and microstructure. The main result of the investigations is the fact that semi-finished products made from chips with thicker oxide layers tend to be more brittle. In addition, thick oxide layers cause microstructural and surface defects.</jats:p>"}],"citation":{"apa":"Gabsa, S., Homberg, W., Goller, T., Nordieker, A. B., &#38; Grundmeier, G. (2025). Influence of different oxide thicknesses on the friction induced and continuous solid-state recycling of aluminum scrap. <i>Materials Research Proceedings</i>, <i>54</i>. <a href=\"https://doi.org/10.21741/9781644903599-272\">https://doi.org/10.21741/9781644903599-272</a>","ieee":"S. Gabsa, W. Homberg, T. Goller, A. B. Nordieker, and G. Grundmeier, “Influence of different oxide thicknesses on the friction induced and continuous solid-state recycling of aluminum scrap,” in <i>Materials Research Proceedings</i>, 2025, vol. 54, doi: <a href=\"https://doi.org/10.21741/9781644903599-272\">10.21741/9781644903599-272</a>.","short":"S. Gabsa, W. Homberg, T. Goller, A.B. Nordieker, G. Grundmeier, in: Materials Research Proceedings, Materials Research Forum LLC, 2025.","chicago":"Gabsa, Steffen, Werner Homberg, Timothy Goller, Ansgar Bernhard Nordieker, and Guido Grundmeier. “Influence of Different Oxide Thicknesses on the Friction Induced and Continuous Solid-State Recycling of Aluminum Scrap.” In <i>Materials Research Proceedings</i>, Vol. 54. Materials Research Forum LLC, 2025. <a href=\"https://doi.org/10.21741/9781644903599-272\">https://doi.org/10.21741/9781644903599-272</a>.","mla":"Gabsa, Steffen, et al. “Influence of Different Oxide Thicknesses on the Friction Induced and Continuous Solid-State Recycling of Aluminum Scrap.” <i>Materials Research Proceedings</i>, vol. 54, Materials Research Forum LLC, 2025, doi:<a href=\"https://doi.org/10.21741/9781644903599-272\">10.21741/9781644903599-272</a>.","ama":"Gabsa S, Homberg W, Goller T, Nordieker AB, Grundmeier G. Influence of different oxide thicknesses on the friction induced and continuous solid-state recycling of aluminum scrap. In: <i>Materials Research Proceedings</i>. Vol 54. Materials Research Forum LLC; 2025. doi:<a href=\"https://doi.org/10.21741/9781644903599-272\">10.21741/9781644903599-272</a>","bibtex":"@inproceedings{Gabsa_Homberg_Goller_Nordieker_Grundmeier_2025, title={Influence of different oxide thicknesses on the friction induced and continuous solid-state recycling of aluminum scrap}, volume={54}, DOI={<a href=\"https://doi.org/10.21741/9781644903599-272\">10.21741/9781644903599-272</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Gabsa, Steffen and Homberg, Werner and Goller, Timothy and Nordieker, Ansgar Bernhard and Grundmeier, Guido}, year={2025} }"},"publication":"Materials Research Proceedings"},{"_id":"53638","language":[{"iso":"eng"}],"publisher":"Materials Research Forum LLC","doi":"10.21741/9781644903131-154","user_id":"64977","status":"public","title":"Modular 3D roller straightening – A new approach to straightening and forming of spring steel wires (X10CrNi18-8)","year":"2024","conference":{"location":"Toulouse","name":"ESAFORM2024"},"author":[{"first_name":"Frederik Simon","last_name":"Dahms","full_name":"Dahms, Frederik Simon","id":"64977"},{"id":"233","first_name":"Werner","last_name":"Homberg","full_name":"Homberg, Werner"}],"publication_identifier":{"issn":["2474-395X"]},"date_updated":"2024-05-27T08:16:18Z","publication_status":"published","date_created":"2024-04-25T08:29:20Z","type":"conference","department":[{"_id":"156"}],"publication":"Materials Research Proceedings","citation":{"mla":"Dahms, Frederik Simon, and Werner Homberg. “Modular 3D Roller Straightening – A New Approach to Straightening and Forming of Spring Steel Wires (X10CrNi18-8).” <i>Materials Research Proceedings</i>, Materials Research Forum LLC, 2024, doi:<a href=\"https://doi.org/10.21741/9781644903131-154\">10.21741/9781644903131-154</a>.","apa":"Dahms, F. S., &#38; Homberg, W. (2024). Modular 3D roller straightening – A new approach to straightening and forming of spring steel wires (X10CrNi18-8). <i>Materials Research Proceedings</i>. ESAFORM2024, Toulouse. <a href=\"https://doi.org/10.21741/9781644903131-154\">https://doi.org/10.21741/9781644903131-154</a>","ieee":"F. S. Dahms and W. Homberg, “Modular 3D roller straightening – A new approach to straightening and forming of spring steel wires (X10CrNi18-8),” presented at the ESAFORM2024, Toulouse, 2024, doi: <a href=\"https://doi.org/10.21741/9781644903131-154\">10.21741/9781644903131-154</a>.","chicago":"Dahms, Frederik Simon, and Werner Homberg. “Modular 3D Roller Straightening – A New Approach to Straightening and Forming of Spring Steel Wires (X10CrNi18-8).” In <i>Materials Research Proceedings</i>. Materials Research Forum LLC, 2024. <a href=\"https://doi.org/10.21741/9781644903131-154\">https://doi.org/10.21741/9781644903131-154</a>.","short":"F.S. Dahms, W. Homberg, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.","ama":"Dahms FS, Homberg W. Modular 3D roller straightening – A new approach to straightening and forming of spring steel wires (X10CrNi18-8). In: <i>Materials Research Proceedings</i>. Materials Research Forum LLC; 2024. doi:<a href=\"https://doi.org/10.21741/9781644903131-154\">10.21741/9781644903131-154</a>","bibtex":"@inproceedings{Dahms_Homberg_2024, title={Modular 3D roller straightening – A new approach to straightening and forming of spring steel wires (X10CrNi18-8)}, DOI={<a href=\"https://doi.org/10.21741/9781644903131-154\">10.21741/9781644903131-154</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Dahms, Frederik Simon and Homberg, Werner}, year={2024} }"},"abstract":[{"text":"<jats:p>Abstract. Spring steel wires are usually supplied and stored on coils. The manufacturing and coiling processes of these wires induce inhomogeneous plastic deformations that lead to undesirable residual stresses and varying wire curvatures in the semi-finished product. These residual stresses and curvatures defects are causing varying process conditions in the subsequent manufacturing processes, which have a negative impact on the product quality, leading to wastage and thus affecting the economic and ecological efficiency. Especially the curvature deviations must be compensated for the stability of the subsequent processes. This is usually realised with roller straighteners, which are set manually by the machine operators only at the beginning of a process. In this paper, we introduce a new approach with a modular straightening-machine design and a new set-up process. The more isolated deformation behaviour in a module-based straightener overcomes the complexity of interactions between the close-positioned spaced straightening rollers. This is combined with a set-up process that is independent of conventional material testing, modelling the actual and batch-specific behaviour of the wire in the straightening process. The exact knowledge and time-consuming determination of the material properties thus becomes obsolete. The experimental investigations show the influence of defined straightening strategies on the residual stress evolution and the residual forming limit of the spring steel wires (X10CrNi18-8) in the new straightening process. </jats:p>","lang":"eng"}],"quality_controlled":"1"},{"status":"public","volume":7,"user_id":"82875","_id":"62025","publisher":"Wiley","citation":{"apa":"Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., &#38; Walther, F. (2024). Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/scp&#62;. <i>Engineering Reports</i>, <i>7</i>(1), Article e13070. <a href=\"https://doi.org/10.1002/eng2.13070\">https://doi.org/10.1002/eng2.13070</a>","ieee":"J. Rozo Vasquez <i>et al.</i>, “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/scp&#62;,” <i>Engineering Reports</i>, vol. 7, no. 1, Art. no. e13070, 2024, doi: <a href=\"https://doi.org/10.1002/eng2.13070\">10.1002/eng2.13070</a>.","chicago":"Rozo Vasquez, Julian, Hanigah Kanagarajah, Bahman Arian, Lukas Kersting, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/Scp&#62;.” <i>Engineering Reports</i> 7, no. 1 (2024). <a href=\"https://doi.org/10.1002/eng2.13070\">https://doi.org/10.1002/eng2.13070</a>.","short":"J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, Engineering Reports 7 (2024).","mla":"Rozo Vasquez, Julian, et al. “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/Scp&#62;.” <i>Engineering Reports</i>, vol. 7, no. 1, e13070, Wiley, 2024, doi:<a href=\"https://doi.org/10.1002/eng2.13070\">10.1002/eng2.13070</a>.","ama":"Rozo Vasquez J, Kanagarajah H, Arian B, et al. Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/scp&#62;. <i>Engineering Reports</i>. 2024;7(1). doi:<a href=\"https://doi.org/10.1002/eng2.13070\">10.1002/eng2.13070</a>","bibtex":"@article{Rozo Vasquez_Kanagarajah_Arian_Kersting_Homberg_Trächtler_Walther_2024, title={Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/scp&#62;}, volume={7}, DOI={<a href=\"https://doi.org/10.1002/eng2.13070\">10.1002/eng2.13070</a>}, number={1e13070}, journal={Engineering Reports}, publisher={Wiley}, author={Rozo Vasquez, Julian and Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }"},"oa":"1","intvolume":"         7","publication_status":"published","date_updated":"2025-10-30T12:54:40Z","author":[{"full_name":"Rozo Vasquez, Julian","last_name":"Rozo Vasquez","first_name":"Julian"},{"last_name":"Kanagarajah","first_name":"Hanigah","full_name":"Kanagarajah, Hanigah"},{"full_name":"Arian, Bahman","last_name":"Arian","first_name":"Bahman","id":"36287"},{"first_name":"Lukas","last_name":"Kersting","full_name":"Kersting, Lukas"},{"id":"233","last_name":"Homberg","first_name":"Werner","full_name":"Homberg, Werner"},{"id":"552","full_name":"Trächtler, Ansgar","last_name":"Trächtler","first_name":"Ansgar"},{"full_name":"Walther, Frank","first_name":"Frank","last_name":"Walther"}],"publication_identifier":{"issn":["2577-8196","2577-8196"]},"year":"2024","title":"Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>","doi":"10.1002/eng2.13070","language":[{"iso":"eng"}],"article_number":"e13070","main_file_link":[{"url":"https://doi.org/10.1002/eng2.13070","open_access":"1"}],"abstract":[{"lang":"eng","text":"<jats:title>ABSTRACT</jats:title><jats:p>This paper deals with micromagnetic measurements for online detection of strain‐induced α′‐martensite during plastic deformation of metastable austenitic steel AISI 304L. The operating principles of the sensors are magnetic Barkhausen noise (MBN) and eddy currents (EC), which are suitable for detection of microstructure evolution due to formation of ferromagnetic phases. The focus of this study was put on the qualification of different micromagnetic techniques and different measurement systems under conditions similar to the real ones during production, which is crucial for implementation of a property‐controlled flow forming process. The investigation was carried out on tubular specimens produced by flow forming, which have different content of α′‐martensite. To characterize the sensitivity of the sensors, different contact conditions between sensors and workpieces were reproduced. MBN sensors are suitable for detecting amount of α′‐martensite, but the measurements are affected by the surface roughness. This entails that the calibration models for MBN sensors must take account of these effects. EC sensors show a closer match with the amount of α′‐martensite without having major affectation by other effects.</jats:p>"}],"issue":"1","publication":"Engineering Reports","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"type":"journal_article","date_created":"2025-10-30T12:25:57Z"},{"type":"journal_article","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"date_created":"2025-11-03T10:28:12Z","abstract":[{"lang":"eng","text":"<jats:title>ABSTRACT</jats:title><jats:p>This paper deals with micromagnetic measurements for online detection of strain‐induced α′‐martensite during plastic deformation of metastable austenitic steel AISI 304L. The operating principles of the sensors are magnetic Barkhausen noise (MBN) and eddy currents (EC), which are suitable for detection of microstructure evolution due to formation of ferromagnetic phases. The focus of this study was put on the qualification of different micromagnetic techniques and different measurement systems under conditions similar to the real ones during production, which is crucial for implementation of a property‐controlled flow forming process. The investigation was carried out on tubular specimens produced by flow forming, which have different content of α′‐martensite. To characterize the sensitivity of the sensors, different contact conditions between sensors and workpieces were reproduced. MBN sensors are suitable for detecting amount of α′‐martensite, but the measurements are affected by the surface roughness. This entails that the calibration models for MBN sensors must take account of these effects. EC sensors show a closer match with the amount of α′‐martensite without having major affectation by other effects.</jats:p>"}],"publication":"Engineering Reports","issue":"1","doi":"10.1002/eng2.13070","article_number":"e13070","main_file_link":[{"url":"https://doi.org/10.1002/eng2.13070","open_access":"1"}],"language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2025-11-03T10:29:18Z","intvolume":"         7","title":"Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel <scp>AISI 304L</scp>","year":"2024","author":[{"first_name":"Julian","last_name":"Rozo Vasquez","full_name":"Rozo Vasquez, Julian"},{"full_name":"Kanagarajah, Hanigah","last_name":"Kanagarajah","first_name":"Hanigah"},{"last_name":"Arian","first_name":"Bahman","full_name":"Arian, Bahman","id":"36287"},{"full_name":"Kersting, Lukas","last_name":"Kersting","first_name":"Lukas"},{"full_name":"Homberg, Werner","last_name":"Homberg","first_name":"Werner","id":"233"},{"last_name":"Trächtler","first_name":"Ansgar","full_name":"Trächtler, Ansgar","id":"552"},{"last_name":"Walther","first_name":"Frank","full_name":"Walther, Frank"}],"publication_identifier":{"issn":["2577-8196","2577-8196"]},"oa":"1","citation":{"short":"J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, Engineering Reports 7 (2024).","chicago":"Rozo Vasquez, Julian, Hanigah Kanagarajah, Bahman Arian, Lukas Kersting, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/Scp&#62;.” <i>Engineering Reports</i> 7, no. 1 (2024). <a href=\"https://doi.org/10.1002/eng2.13070\">https://doi.org/10.1002/eng2.13070</a>.","apa":"Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., &#38; Walther, F. (2024). Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/scp&#62;. <i>Engineering Reports</i>, <i>7</i>(1), Article e13070. <a href=\"https://doi.org/10.1002/eng2.13070\">https://doi.org/10.1002/eng2.13070</a>","ieee":"J. Rozo Vasquez <i>et al.</i>, “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/scp&#62;,” <i>Engineering Reports</i>, vol. 7, no. 1, Art. no. e13070, 2024, doi: <a href=\"https://doi.org/10.1002/eng2.13070\">10.1002/eng2.13070</a>.","ama":"Rozo Vasquez J, Kanagarajah H, Arian B, et al. Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/scp&#62;. <i>Engineering Reports</i>. 2024;7(1). doi:<a href=\"https://doi.org/10.1002/eng2.13070\">10.1002/eng2.13070</a>","bibtex":"@article{Rozo Vasquez_Kanagarajah_Arian_Kersting_Homberg_Trächtler_Walther_2024, title={Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/scp&#62;}, volume={7}, DOI={<a href=\"https://doi.org/10.1002/eng2.13070\">10.1002/eng2.13070</a>}, number={1e13070}, journal={Engineering Reports}, publisher={Wiley}, author={Rozo Vasquez, Julian and Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }","mla":"Rozo Vasquez, Julian, et al. “Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel &#60;scp&#62;AISI 304L&#60;/Scp&#62;.” <i>Engineering Reports</i>, vol. 7, no. 1, e13070, Wiley, 2024, doi:<a href=\"https://doi.org/10.1002/eng2.13070\">10.1002/eng2.13070</a>."},"user_id":"82875","volume":7,"publisher":"Wiley","_id":"62053","status":"public"},{"abstract":[{"lang":"eng","text":"<jats:p> Lightweight design by using low-density and load-adapted materials can reduce the weight of vehicles and the emissions generated during operation. However, the usage of different materials requires innovative joining technologies with increased versatility. In this investigation, the focus is on describing and characterising the failure behaviour of connections manufactured by an innovative thermomechanical joining process with adaptable auxiliary joining elements in single-lap tensile-shear tests. In order to analyse the failure development in detail, the specimens are investigated using in-situ computed tomography (in-situ CT). Here, the tensile-shear test is interrupted at points of interest and CT scans are conducted under load. In addition, the interrupted in-situ testing procedure is validated by comparing the loading behaviour with conventional continuous tensile-shear tests. The results of the in-situ investigations of joints with varying material combinations clearly describe the cause of failure, allowing conclusions towards an improved joint design. </jats:p>"}],"issue":"12","publication":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","type":"journal_article","department":[{"_id":"156"}],"date_created":"2025-12-19T09:13:30Z","date_updated":"2025-12-22T10:40:28Z","publication_status":"published","intvolume":"       238","year":"2024","title":"In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element","author":[{"id":"83141","first_name":"Thomas","last_name":"Borgert","full_name":"Borgert, Thomas"},{"first_name":"D","last_name":"Köhler","full_name":"Köhler, D"},{"full_name":"Wiens, Eugen","last_name":"Wiens","first_name":"Eugen","id":"7888"},{"first_name":"R","last_name":"Kupfer","full_name":"Kupfer, R"},{"first_name":"J","last_name":"Troschitz","full_name":"Troschitz, J"},{"full_name":"Homberg, Werner","first_name":"Werner","last_name":"Homberg","id":"233"},{"full_name":"Gude, M","first_name":"M","last_name":"Gude"}],"publication_identifier":{"issn":["1464-4207","2041-3076"]},"doi":"10.1177/14644207241232233","language":[{"iso":"eng"}],"quality_controlled":"1","citation":{"apa":"Borgert, T., Köhler, D., Wiens, E., Kupfer, R., Troschitz, J., Homberg, W., &#38; Gude, M. (2024). In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element. <i>Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications</i>, <i>238</i>(12), 2299–2306. <a href=\"https://doi.org/10.1177/14644207241232233\">https://doi.org/10.1177/14644207241232233</a>","ieee":"T. Borgert <i>et al.</i>, “In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element,” <i>Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications</i>, vol. 238, no. 12, pp. 2299–2306, 2024, doi: <a href=\"https://doi.org/10.1177/14644207241232233\">10.1177/14644207241232233</a>.","short":"T. Borgert, D. Köhler, E. Wiens, R. Kupfer, J. Troschitz, W. Homberg, M. Gude, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238 (2024) 2299–2306.","chicago":"Borgert, Thomas, D Köhler, Eugen Wiens, R Kupfer, J Troschitz, Werner Homberg, and M Gude. “In-Situ Computed Tomography Analysis of the Failure Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” <i>Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications</i> 238, no. 12 (2024): 2299–2306. <a href=\"https://doi.org/10.1177/14644207241232233\">https://doi.org/10.1177/14644207241232233</a>.","mla":"Borgert, Thomas, et al. “In-Situ Computed Tomography Analysis of the Failure Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” <i>Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications</i>, vol. 238, no. 12, SAGE Publications, 2024, pp. 2299–306, doi:<a href=\"https://doi.org/10.1177/14644207241232233\">10.1177/14644207241232233</a>.","ama":"Borgert T, Köhler D, Wiens E, et al. In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element. <i>Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications</i>. 2024;238(12):2299-2306. doi:<a href=\"https://doi.org/10.1177/14644207241232233\">10.1177/14644207241232233</a>","bibtex":"@article{Borgert_Köhler_Wiens_Kupfer_Troschitz_Homberg_Gude_2024, title={In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element}, volume={238}, DOI={<a href=\"https://doi.org/10.1177/14644207241232233\">10.1177/14644207241232233</a>}, number={12}, journal={Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}, publisher={SAGE Publications}, author={Borgert, Thomas and Köhler, D and Wiens, Eugen and Kupfer, R and Troschitz, J and Homberg, Werner and Gude, M}, year={2024}, pages={2299–2306} }"},"status":"public","user_id":"7888","volume":238,"page":"2299-2306","_id":"63346","publisher":"SAGE Publications"},{"type":"book_chapter","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"date_created":"2024-11-18T10:24:06Z","place":"Cham","abstract":[{"text":"This paper deals with the modeling of a soft sensor for detecting α’-martensite evolution from the micromagnetic signals that are measured during the reverse flow forming of metastable AISI 304L austenitic steel. This model can be prospectively used inside a closed-loop property-controlled flow forming process. To achieve this, optimization by means of a non-linear regression of experimental data was carried out. To collect the experimental data, specimens were produced by flow forming seamless tubes at room temperature. Using a combination of production parameters (like the infeed depth and feed rate), specimens with different α’-martensite contents and wall-thickness reductions were produced. An equation to compute α’-martensite from both specific production-process parameters and micromagnetic Barkhausen noise (MBN) measurements was obtained using numerical methods. In this process, the behavior of the quantity of interest (namely, the α’-martensite content) was mathematically evaluated with respect to non-destructive MBN data and the feed rate that was used to produce the components. A combination of exponential and potential functions was defined as the ansatz functions of the model. The obtained model was validated online and offline during the real flow forming of workpieces, obtaining average deviations of up to 7% α’-martensite with respect to the model. The implementation of the soft sensor model for property-controlled production represents an important milestone for producing high-added-value components on the basis of a well-understood process-microstructure-property relationship.","lang":"eng"}],"quality_controlled":"1","publication":"Lecture Notes in Mechanical Engineering","citation":{"mla":"Rozo Vasquez, Julian, et al. “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L.” <i>Lecture Notes in Mechanical Engineering</i>, Springer International Publishing, 2024, doi:<a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">10.1007/978-3-031-58006-2_10</a>.","ama":"Rozo Vasquez J, Kersting L, Arian B, Homberg W, Trächtler A, Walther F. Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L. In: <i>Lecture Notes in Mechanical Engineering</i>. Springer International Publishing; 2024. doi:<a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">10.1007/978-3-031-58006-2_10</a>","bibtex":"@inbook{Rozo Vasquez_Kersting_Arian_Homberg_Trächtler_Walther_2024, place={Cham}, title={Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L}, DOI={<a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">10.1007/978-3-031-58006-2_10</a>}, booktitle={Lecture Notes in Mechanical Engineering}, publisher={Springer International Publishing}, author={Rozo Vasquez, Julian  and Kersting, Lukas and Arian, Bahman and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }","apa":"Rozo Vasquez, J., Kersting, L., Arian, B., Homberg, W., Trächtler, A., &#38; Walther, F. (2024). Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L. In <i>Lecture Notes in Mechanical Engineering</i>. Springer International Publishing. <a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">https://doi.org/10.1007/978-3-031-58006-2_10</a>","ieee":"J. Rozo Vasquez, L. Kersting, B. Arian, W. Homberg, A. Trächtler, and F. Walther, “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L,” in <i>Lecture Notes in Mechanical Engineering</i>, Cham: Springer International Publishing, 2024.","short":"J. Rozo Vasquez, L. Kersting, B. Arian, W. Homberg, A. Trächtler, F. Walther, in: Lecture Notes in Mechanical Engineering, Springer International Publishing, Cham, 2024.","chicago":"Rozo Vasquez, Julian , Lukas Kersting, Bahman Arian, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L.” In <i>Lecture Notes in Mechanical Engineering</i>. Cham: Springer International Publishing, 2024. <a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">https://doi.org/10.1007/978-3-031-58006-2_10</a>."},"user_id":"41470","doi":"10.1007/978-3-031-58006-2_10","language":[{"iso":"eng"}],"_id":"57190","publisher":"Springer International Publishing","publication_status":"published","date_updated":"2024-11-18T10:39:03Z","status":"public","year":"2024","title":"Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L","publication_identifier":{"isbn":["9783031580055","9783031580062"],"issn":["2195-4356","2195-4364"]},"author":[{"full_name":"Rozo Vasquez, Julian ","last_name":"Rozo Vasquez","first_name":"Julian "},{"full_name":"Kersting, Lukas","first_name":"Lukas","last_name":"Kersting"},{"first_name":"Bahman","last_name":"Arian","full_name":"Arian, Bahman","id":"36287"},{"id":"233","last_name":"Homberg","first_name":"Werner","full_name":"Homberg, Werner"},{"id":"552","first_name":"Ansgar","last_name":"Trächtler","full_name":"Trächtler, Ansgar"},{"full_name":"Walther, Frank","last_name":"Walther","first_name":"Frank"}]},{"date_updated":"2024-11-18T10:39:19Z","publication_status":"published","status":"public","year":"2024","title":"Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L","author":[{"full_name":"Rozo Vasquez, Julian ","first_name":"Julian ","last_name":"Rozo Vasquez"},{"full_name":"Kanagarajah, Hanigah","first_name":"Hanigah","last_name":"Kanagarajah"},{"id":"36287","last_name":"Arian","first_name":"Bahman","full_name":"Arian, Bahman"},{"first_name":"Lukas","last_name":"Kersting","full_name":"Kersting, Lukas"},{"full_name":"Homberg, Werner","last_name":"Homberg","first_name":"Werner","id":"233"},{"full_name":"Trächtler, Ansgar","first_name":"Ansgar","last_name":"Trächtler","id":"552"},{"first_name":"Frank","last_name":"Walther","full_name":"Walther, Frank"}],"user_id":"41470","language":[{"iso":"eng"}],"_id":"57189","publisher":"Authorea, Inc.","quality_controlled":"1","abstract":[{"lang":"eng","text":"This paper deals with micromagnetic measurements for online detection of\r\nstrain-induced α’-martensite during plastic deformation of metastable\r\naustenitic steel AISI 304L. The operating principles of the sensors are\r\nBarkhausen noise (MBN) and eddy currents (EC), which are suitable for\r\ndetection of microstructure evolution due to formation of ferromagnetic\r\nphases. Nevertheless, the description of the calibration and\r\ntransformation models of the micromagnetic measurements into\r\nquantitative α’-martensite fractions is beyond the scope of this paper.\r\nThe focus will be put on the qualification of different micromagnetic\r\nmethods as well as of different measurement systems under conditions\r\nsimilar to the real ones during production, which is crucial for\r\nimplementation of a property-controlled flow forming process. The\r\ninvestigation was carried out on tubular specimens produced by flow\r\nforming, which have different content of α’-martensite. To characterize\r\nthe sensitivity of the sensors, different contact conditions between\r\nsensors and workpieces were reproduced. MBN sensors are suitable for\r\ndetecting amount of α’-martensite, but the measurements are affected by\r\nthe surface roughness. This entails that the calibration models for MBN\r\nsensors must take account of these effects. EC sensors show a closer\r\nmatch with the amount of α’-martensite without having major affectation\r\nby other effects."}],"citation":{"bibtex":"@inproceedings{Rozo Vasquez_Kanagarajah_Arian_Kersting_Homberg_Trächtler_Walther_2024, title={Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L}, publisher={Authorea, Inc.}, author={Rozo Vasquez, Julian  and Kanagarajah, Hanigah and Arian, Bahman and Kersting, Lukas and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }","ama":"Rozo Vasquez J, Kanagarajah H, Arian B, et al. Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L. In: Authorea, Inc.; 2024.","mla":"Rozo Vasquez, Julian, et al. <i>Barkhausen Noise- and Eddy Current-Based Measurements for Online Detection of Deformation-Induced Martensite during Flow Forming of Metastable Austenitic Steel AISI 304L</i>. Authorea, Inc., 2024.","short":"J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, in: Authorea, Inc., 2024.","chicago":"Rozo Vasquez, Julian , Hanigah Kanagarajah, Bahman Arian, Lukas Kersting, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Barkhausen Noise- and Eddy Current-Based Measurements for Online Detection of Deformation-Induced Martensite during Flow Forming of Metastable Austenitic Steel AISI 304L.” Authorea, Inc., 2024.","ieee":"J. Rozo Vasquez <i>et al.</i>, “Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L,” 2024.","apa":"Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., &#38; Walther, F. (2024). <i>Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L</i>."},"type":"conference","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"date_created":"2024-11-18T10:22:34Z"},{"citation":{"bibtex":"@article{Bathelt_Djakow_Henke_Trächtler_2024, title={Innovative measurement system for saber curvature observation in straightening processes}, volume={232}, DOI={<a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">10.1016/j.procs.2024.02.024</a>}, journal={Procedia Computer Science}, publisher={Elsevier BV}, author={Bathelt, Lukas and Djakow, Eugen and Henke, Christian and Trächtler, Ansgar}, year={2024}, pages={2018–2027} }","ama":"Bathelt L, Djakow E, Henke C, Trächtler A. Innovative measurement system for saber curvature observation in straightening processes. <i>Procedia Computer Science</i>. 2024;232:2018-2027. doi:<a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">10.1016/j.procs.2024.02.024</a>","mla":"Bathelt, Lukas, et al. “Innovative Measurement System for Saber Curvature Observation in Straightening Processes.” <i>Procedia Computer Science</i>, vol. 232, Elsevier BV, 2024, pp. 2018–27, doi:<a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">10.1016/j.procs.2024.02.024</a>.","short":"L. Bathelt, E. Djakow, C. Henke, A. Trächtler, Procedia Computer Science 232 (2024) 2018–2027.","chicago":"Bathelt, Lukas, Eugen Djakow, Christian Henke, and Ansgar Trächtler. “Innovative Measurement System for Saber Curvature Observation in Straightening Processes.” <i>Procedia Computer Science</i> 232 (2024): 2018–27. <a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">https://doi.org/10.1016/j.procs.2024.02.024</a>.","ieee":"L. Bathelt, E. Djakow, C. Henke, and A. Trächtler, “Innovative measurement system for saber curvature observation in straightening processes,” <i>Procedia Computer Science</i>, vol. 232, pp. 2018–2027, 2024, doi: <a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">10.1016/j.procs.2024.02.024</a>.","apa":"Bathelt, L., Djakow, E., Henke, C., &#38; Trächtler, A. (2024). Innovative measurement system for saber curvature observation in straightening processes. <i>Procedia Computer Science</i>, <i>232</i>, 2018–2027. <a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">https://doi.org/10.1016/j.procs.2024.02.024</a>"},"quality_controlled":"1","status":"public","page":"2018-2027","_id":"57175","publisher":"Elsevier BV","user_id":"41470","volume":232,"publication":"Procedia Computer Science","date_created":"2024-11-18T10:09:22Z","type":"journal_article","department":[{"_id":"153"},{"_id":"241"}],"year":"2024","title":"Innovative measurement system for saber curvature observation in straightening processes","author":[{"last_name":"Bathelt","first_name":"Lukas","full_name":"Bathelt, Lukas"},{"full_name":"Djakow, Eugen","first_name":"Eugen","last_name":"Djakow","id":"7904"},{"last_name":"Henke","first_name":"Christian","full_name":"Henke, Christian"},{"id":"552","first_name":"Ansgar","last_name":"Trächtler","full_name":"Trächtler, Ansgar"}],"publication_identifier":{"issn":["1877-0509"]},"publication_status":"published","date_updated":"2024-11-18T10:38:39Z","intvolume":"       232","language":[{"iso":"eng"}],"doi":"10.1016/j.procs.2024.02.024"},{"quality_controlled":"1","citation":{"mla":"Arian, Bahman, et al. “α’-Martensite Grading Techniques in Reverse Flow Forming of AISI 304L.” <i>Materials Research Proceedings</i>, vol. 44, Materials Research Forum LLC, 2024, doi:<a href=\"https://doi.org/10.21741/9781644903254-76\">10.21741/9781644903254-76</a>.","ama":"Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. α’-martensite grading techniques in reverse flow forming of AISI 304L. In: <i>Materials Research Proceedings</i>. Vol 44. Materials Research Forum LLC; 2024. doi:<a href=\"https://doi.org/10.21741/9781644903254-76\">10.21741/9781644903254-76</a>","bibtex":"@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2024, title={α’-martensite grading techniques in reverse flow forming of AISI 304L}, volume={44}, DOI={<a href=\"https://doi.org/10.21741/9781644903254-76\">10.21741/9781644903254-76</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler, Ansgar and Rozo Vasquez, Julian and Walther, Frank}, year={2024} }","apa":"Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., &#38; Walther, F. (2024). α’-martensite grading techniques in reverse flow forming of AISI 304L. <i>Materials Research Proceedings</i>, <i>44</i>. <a href=\"https://doi.org/10.21741/9781644903254-76\">https://doi.org/10.21741/9781644903254-76</a>","ieee":"B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F. Walther, “α’-martensite grading techniques in reverse flow forming of AISI 304L,” in <i>Materials Research Proceedings</i>, 2024, vol. 44, doi: <a href=\"https://doi.org/10.21741/9781644903254-76\">10.21741/9781644903254-76</a>.","chicago":"Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian Rozo Vasquez, and Frank Walther. “α’-Martensite Grading Techniques in Reverse Flow Forming of AISI 304L.” In <i>Materials Research Proceedings</i>, Vol. 44. Materials Research Forum LLC, 2024. <a href=\"https://doi.org/10.21741/9781644903254-76\">https://doi.org/10.21741/9781644903254-76</a>.","short":"B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC, 2024."},"volume":44,"user_id":"41470","publisher":"Materials Research Forum LLC","_id":"57173","status":"public","department":[{"_id":"241"},{"_id":"153"},{"_id":"156"}],"type":"conference","date_created":"2024-11-18T10:06:17Z","abstract":[{"lang":"eng","text":"Manufacturing processes benefit from property control enabling reproducibility, application oriented outcomes, and efficient part production. In reverse flow forming, state of the art practices focus primarily on geometry control, neglecting property control. Given the intricacies of the process involving the interaction of tool and machine behavior, process parameters, properties of semi finished products and temperatures, incorporating process control becomes an imperative for producing components with predefined properties. The property controlled within this reverse flow forming process is the local α’ martensite content. Therefore, process strategies to actively influence the α’ martensite content must be implemented. In this study seamless AISI 304L steel tubes are used, where α’ martensite formation is strain  and/or temperature induced through phase transformation within the process. This paper presents innovative process strategies, methods, and specially developed mechanical and thermal actuator systems to locally increase or suppress the α’ martensite content. The use and implementation of these approaches and tools allows the creation of unique optically invisible microstructure profiles containing 3D gradings, implying a radial grading of α’ martensite. The locally implemented α’ martensite, forming these 3D gradings, offers potential applications for functional or sensory purposes. This paper extends beyond theoretical concepts, providing tangible component outcomes."}],"publication":"Materials Research Proceedings","doi":"10.21741/9781644903254-76","language":[{"iso":"eng"}],"intvolume":"        44","date_updated":"2024-11-18T10:42:55Z","publication_status":"published","publication_identifier":{"issn":["2474-395X"]},"author":[{"last_name":"Arian","first_name":"Bahman","full_name":"Arian, Bahman","id":"36287"},{"id":"233","full_name":"Homberg, Werner","first_name":"Werner","last_name":"Homberg"},{"first_name":"Lukas","last_name":"Kersting","full_name":"Kersting, Lukas"},{"id":"552","full_name":"Trächtler, Ansgar","last_name":"Trächtler","first_name":"Ansgar"},{"full_name":"Rozo Vasquez, Julian","last_name":"Rozo Vasquez","first_name":"Julian"},{"full_name":"Walther, Frank","first_name":"Frank","last_name":"Walther"}],"title":"α’-martensite grading techniques in reverse flow forming of AISI 304L","year":"2024"},{"volume":41,"user_id":"41470","publisher":"Materials Research Forum LLC","_id":"57174","status":"public","quality_controlled":"1","citation":{"mla":"Bathelt, Lukas, et al. “Innovative Control System for Straightening Machines Using Sensor Information from Downstream Processes.” <i>Materials Research Proceedings</i>, vol. 41, Materials Research Forum LLC, 2024, doi:<a href=\"https://doi.org/10.21741/9781644903131-308\">10.21741/9781644903131-308</a>.","ama":"Bathelt L, Djakow E, Henke C, Trächtler A. Innovative control system for straightening machines using sensor information from downstream processes. In: <i>Materials Research Proceedings</i>. Vol 41. Materials Research Forum LLC; 2024. doi:<a href=\"https://doi.org/10.21741/9781644903131-308\">10.21741/9781644903131-308</a>","bibtex":"@inproceedings{Bathelt_Djakow_Henke_Trächtler_2024, title={Innovative control system for straightening machines using sensor information from downstream processes}, volume={41}, DOI={<a href=\"https://doi.org/10.21741/9781644903131-308\">10.21741/9781644903131-308</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Bathelt, Lukas and Djakow, Eugen and Henke, Christian and Trächtler, Ansgar}, year={2024} }","apa":"Bathelt, L., Djakow, E., Henke, C., &#38; Trächtler, A. (2024). Innovative control system for straightening machines using sensor information from downstream processes. <i>Materials Research Proceedings</i>, <i>41</i>. <a href=\"https://doi.org/10.21741/9781644903131-308\">https://doi.org/10.21741/9781644903131-308</a>","ieee":"L. Bathelt, E. Djakow, C. Henke, and A. Trächtler, “Innovative control system for straightening machines using sensor information from downstream processes,” in <i>Materials Research Proceedings</i>, 2024, vol. 41, doi: <a href=\"https://doi.org/10.21741/9781644903131-308\">10.21741/9781644903131-308</a>.","chicago":"Bathelt, Lukas, Eugen Djakow, Christian Henke, and Ansgar Trächtler. “Innovative Control System for Straightening Machines Using Sensor Information from Downstream Processes.” In <i>Materials Research Proceedings</i>, Vol. 41. Materials Research Forum LLC, 2024. <a href=\"https://doi.org/10.21741/9781644903131-308\">https://doi.org/10.21741/9781644903131-308</a>.","short":"L. Bathelt, E. Djakow, C. Henke, A. Trächtler, in: Materials Research Proceedings, Materials Research Forum LLC, 2024."},"doi":"10.21741/9781644903131-308","language":[{"iso":"eng"}],"intvolume":"        41","date_updated":"2024-11-18T10:42:37Z","publication_status":"published","author":[{"full_name":"Bathelt, Lukas","first_name":"Lukas","last_name":"Bathelt"},{"last_name":"Djakow","first_name":"Eugen","full_name":"Djakow, Eugen","id":"7904"},{"last_name":"Henke","first_name":"Christian","full_name":"Henke, Christian"},{"full_name":"Trächtler, Ansgar","last_name":"Trächtler","first_name":"Ansgar","id":"552"}],"publication_identifier":{"issn":["2474-395X"]},"year":"2024","title":"Innovative control system for straightening machines using sensor information from downstream processes","department":[{"_id":"241"},{"_id":"153"}],"type":"conference","date_created":"2024-11-18T10:08:22Z","abstract":[{"lang":"eng","text":"Increasing the sustainability and resource efficiency of forming processes is one of today's major goals. High-strength wire materials are usually available as strip material and are subjected to a downstream forming process such as punch-bending to produce parts for the electronics industry, for example. During the manufacturing process of the semi-finished product, residual stresses and plastic deformations are introduced into the wire by rolling and drawing processes. Straightening machines are used in the production lines to compensate for these. To increase the sustainability of these production lines, the straightening process is an essential step. Before the continuous manufacturing process starts, the straightening process must be set up and the optimal roller positions must be found. Once the process is set up, the roller position settings are usually not changed. Due to missing measurement systems for the straightening quality, it is not possible to dynamically adjust the positions of the straightening rollers to variations in the material properties. This leads to deviations in the dimensional accuracy of the components to be produced and thus to an increase in the rejection rate in the manufacturing processes. To reduce the rejection rate, a novel control system for a continuous feedback control of a straightening process is presented in this paper. This leads to a reduction of the rejection rate and unnecessary preforming operations in wire straightening process. The result is an increasing sustainability and efficiency of these production process."}],"publication":"Materials Research Proceedings"},{"_id":"57178","publisher":"Materials Research Forum LLC","volume":41,"user_id":"41470","status":"public","citation":{"bibtex":"@inproceedings{Kersting_Sander_Arian_Rozo Vasquez_Trächtler_Homberg_Walther_2024, title={Improving the flow forming process by a novel closed-loop control}, volume={41}, DOI={<a href=\"https://doi.org/10.21741/9781644903131-158\">10.21741/9781644903131-158</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Kersting, Lukas and Sander, Sebastian and Arian, Bahman and Rozo Vasquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}, year={2024} }","ama":"Kersting L, Sander S, Arian B, et al. Improving the flow forming process by a novel closed-loop control. In: <i>Materials Research Proceedings</i>. Vol 41. Materials Research Forum LLC; 2024. doi:<a href=\"https://doi.org/10.21741/9781644903131-158\">10.21741/9781644903131-158</a>","mla":"Kersting, Lukas, et al. “Improving the Flow Forming Process by a Novel Closed-Loop Control.” <i>Materials Research Proceedings</i>, vol. 41, Materials Research Forum LLC, 2024, doi:<a href=\"https://doi.org/10.21741/9781644903131-158\">10.21741/9781644903131-158</a>.","chicago":"Kersting, Lukas, Sebastian Sander, Bahman Arian, Julian Rozo Vasquez, Ansgar Trächtler, Werner Homberg, and Frank Walther. “Improving the Flow Forming Process by a Novel Closed-Loop Control.” In <i>Materials Research Proceedings</i>, Vol. 41. Materials Research Forum LLC, 2024. <a href=\"https://doi.org/10.21741/9781644903131-158\">https://doi.org/10.21741/9781644903131-158</a>.","short":"L. Kersting, S. Sander, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.","ieee":"L. Kersting <i>et al.</i>, “Improving the flow forming process by a novel closed-loop control,” in <i>Materials Research Proceedings</i>, 2024, vol. 41, doi: <a href=\"https://doi.org/10.21741/9781644903131-158\">10.21741/9781644903131-158</a>.","apa":"Kersting, L., Sander, S., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., &#38; Walther, F. (2024). Improving the flow forming process by a novel closed-loop control. <i>Materials Research Proceedings</i>, <i>41</i>. <a href=\"https://doi.org/10.21741/9781644903131-158\">https://doi.org/10.21741/9781644903131-158</a>"},"quality_controlled":"1","language":[{"iso":"eng"}],"doi":"10.21741/9781644903131-158","publication_identifier":{"issn":["2474-395X"]},"author":[{"full_name":"Kersting, Lukas","last_name":"Kersting","first_name":"Lukas"},{"full_name":"Sander, Sebastian","last_name":"Sander","first_name":"Sebastian"},{"id":"36287","last_name":"Arian","first_name":"Bahman","full_name":"Arian, Bahman"},{"first_name":"Julian","last_name":"Rozo Vasquez","full_name":"Rozo Vasquez, Julian"},{"id":"552","last_name":"Trächtler","first_name":"Ansgar","full_name":"Trächtler, Ansgar"},{"full_name":"Homberg, Werner","first_name":"Werner","last_name":"Homberg","id":"233"},{"full_name":"Walther, Frank","first_name":"Frank","last_name":"Walther"}],"year":"2024","title":"Improving the flow forming process by a novel closed-loop control","intvolume":"        41","publication_status":"published","date_updated":"2024-11-18T10:41:46Z","date_created":"2024-11-18T10:11:24Z","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"type":"conference","publication":"Materials Research Proceedings","abstract":[{"text":"The incremental flow forming process is currently enhanced in research context by special closed-loop property control concepts to increase the productivity and to control the product properties making invisible property structures like a magnetic barcode possible. However, it is preferred to establish property control concepts on single roller machines instead of conventional machines with three roller actuation due to the better machine accessibility. For those single roller machines, rather poor surface qualities of flow formed workpieces were observed in the past especially for hydraulic actuators. Thus, a new actuator closed-loop position control concept is developed in this paper using model-based control design methods and taking the flow forming forces as a load into account. The novel closed-loop control is validated during workpiece production at the actual single roller flow forming machine. An analysis of the manufactured workpieces show that the surface quality is significantly enhanced by the new control to a roughness level almost similar to conventional three roller flow forming. Thus, a sincere added value to the flow forming process is offered by the novel actuator closed-loop position control.","lang":"eng"}]}]