--- _id: '59907' abstract: - lang: eng text: 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. author: - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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. Materials Research Proceedings. Vol 54. Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-127' apa: 'Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., & Walther, F. (2025). Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties. In P. Carlone, L. Filice, & D. Umbrello (Eds.), Materials Research Proceedings (Vol. 54). Materials Research Forum LLC. https://doi.org/10.21741/9781644903599-127' 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={10.21741/9781644903599-127}, 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} }' 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 Materials Research Proceedings, edited by Pierpaolo Carlone, Luigino Filice, and Domenico Umbrello, Vol. 54. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-127.' 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 Materials Research Proceedings, Paestum, Italy, 2025, vol. 54, doi: 10.21741/9781644903599-127.' mla: 'Arian, Bahman, et al. “Advanced Thermomechanical Flow Forming: A Novel Approach to α’-Martensite Control for Enhanced Material Properties.” Materials Research Proceedings, edited by Pierpaolo Carlone et al., vol. 54, Materials Research Forum LLC, 2025, doi:10.21741/9781644903599-127.' 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.' conference: end_date: 2025-05-09 location: Paestum, Italy name: The 28th International ESAFORM Conference on Material Forming - ESAFORM 2025 start_date: 2025-05-06 date_created: 2025-05-15T06:59:28Z date_updated: 2025-10-30T13:55:08Z department: - _id: '156' - _id: '153' - _id: '241' doi: 10.21741/9781644903599-127 editor: - first_name: Pierpaolo full_name: Carlone, Pierpaolo last_name: Carlone - first_name: Luigino full_name: Filice, Luigino last_name: Filice - first_name: Domenico full_name: Umbrello, Domenico last_name: Umbrello has_accepted_license: '1' intvolume: ' 54' keyword: - Flow Forming - Thermomechanical Forming - α’-Martensite - Property Control language: - iso: eng main_file_link: - open_access: '1' url: https://mrforum.com/product/9781644903599-127/ oa: '1' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: 'Advanced thermomechanical flow forming: A novel approach to α’-martensite control for enhanced material properties' type: conference user_id: '36287' volume: 54 year: '2025' ... --- _id: '62024' abstract: - lang: eng text: "Abstract\r\n 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.\r\n 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." author: - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Jan full_name: Tappe, Jan last_name: Tappe - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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. Practical Metallography. 2025;62(9-10):617-633. doi:10.1515/pm-2025-0059 apa: Rozo Vasquez, J., Tappe, J., Arian, B., Kersting, L., Homberg, W., Trächtler, A., & Walther, F. (2025). Magneto-optical Kerr effect analysis of strain-induced martensite formation during flow forming of metastable austenitic steel AISI 304L. Practical Metallography, 62(9–10), 617–633. https://doi.org/10.1515/pm-2025-0059 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={10.1515/pm-2025-0059}, 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} }' 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.” Practical Metallography 62, no. 9–10 (2025): 617–33. https://doi.org/10.1515/pm-2025-0059.' ieee: 'J. Rozo Vasquez et al., “Magneto-optical Kerr effect analysis of strain-induced martensite formation during flow forming of metastable austenitic steel AISI 304L,” Practical Metallography, vol. 62, no. 9–10, pp. 617–633, 2025, doi: 10.1515/pm-2025-0059.' 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.” Practical Metallography, vol. 62, no. 9–10, Walter de Gruyter GmbH, 2025, pp. 617–33, doi:10.1515/pm-2025-0059. short: J. Rozo Vasquez, J. Tappe, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, Practical Metallography 62 (2025) 617–633. date_created: 2025-10-30T12:22:54Z date_updated: 2025-10-30T12:54:17Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.1515/pm-2025-0059 intvolume: ' 62' issue: 9-10 language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1515/pm-2025-0059 oa: '1' page: 617-633 publication: Practical Metallography publication_identifier: issn: - 2195-8599 - 0032-678X publication_status: published publisher: Walter de Gruyter GmbH status: public title: Magneto-optical Kerr effect analysis of strain-induced martensite formation during flow forming of metastable austenitic steel AISI 304L type: journal_article user_id: '82875' volume: 62 year: '2025' ... --- _id: '62022' abstract: - lang: eng text: 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. author: - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Sharin Kumar full_name: Gunasagran, Sharin Kumar last_name: Gunasagran - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Julian full_name: Rozo Vaszquez, Julian last_name: Rozo Vaszquez - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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: Materials Research Proceedings. Vol 54. Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-140' apa: Kersting, L., Gunasagran, S. K., Arian, B., Rozo Vaszquez, J., Trächtler, A., Homberg, W., & Walther, F. (2025). Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based model. Materials Research Proceedings, 54. https://doi.org/10.21741/9781644903599-140 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={10.21741/9781644903599-140}, 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} }' 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 Materials Research Proceedings, Vol. 54. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-140. ieee: 'L. Kersting et al., “Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based model,” in Materials Research Proceedings, 2025, vol. 54, doi: 10.21741/9781644903599-140.' mla: Kersting, Lukas, et al. “Real-Time Modelling of Incremental Multi-Pass Flow Forming by a Hybrid, Data-Based Model.” Materials Research Proceedings, vol. 54, Materials Research Forum LLC, 2025, doi:10.21741/9781644903599-140. 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.' date_created: 2025-10-30T12:16:37Z date_updated: 2025-10-30T12:53:36Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.21741/9781644903599-140 intvolume: ' 54' language: - iso: eng main_file_link: - open_access: '1' url: 'https://doi.org/10.21741/9781644903599-140 ' oa: '1' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC status: public title: Real-time modelling of incremental multi-pass flow forming by a hybrid, data-based model type: conference user_id: '82875' volume: 54 year: '2025' ... --- _id: '62023' abstract: - lang: eng text: "Zusammenfassung\r\n 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." author: - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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. at - Automatisierungstechnik. 2025;73(7):527-540. doi:10.1515/auto-2024-0127 apa: Kersting, L., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., & Walther, F. (2025). Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler Austenite. At - Automatisierungstechnik, 73(7), 527–540. https://doi.org/10.1515/auto-2024-0127 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={10.1515/auto-2024-0127}, 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} }' 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.” At - Automatisierungstechnik 73, no. 7 (2025): 527–40. https://doi.org/10.1515/auto-2024-0127.' 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,” at - Automatisierungstechnik, vol. 73, no. 7, pp. 527–540, 2025, doi: 10.1515/auto-2024-0127.' mla: Kersting, Lukas, et al. “Modellbasierter Entwurf Und Validierung Einer Eigenschaftsregelung Für Das Drückwalzen Metastabiler Austenite.” At - Automatisierungstechnik, vol. 73, no. 7, Walter de Gruyter GmbH, 2025, pp. 527–40, doi:10.1515/auto-2024-0127. short: L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, F. Walther, At - Automatisierungstechnik 73 (2025) 527–540. date_created: 2025-10-30T12:21:42Z date_updated: 2025-10-30T12:53:56Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.1515/auto-2024-0127 intvolume: ' 73' issue: '7' language: - iso: eng main_file_link: - open_access: '1' url: 'https://doi.org/10.1515/auto-2024-0127 ' oa: '1' page: 527-540 publication: at - Automatisierungstechnik publication_identifier: issn: - 0178-2312 - 2196-677X publication_status: published publisher: Walter de Gruyter GmbH status: public title: Modellbasierter Entwurf und Validierung einer Eigenschaftsregelung für das Drückwalzen metastabiler Austenite type: journal_article user_id: '82875' volume: 73 year: '2025' ... --- _id: '62021' author: - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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. IFAC-PapersOnLine. 2025;59(1):109-114. doi:10.1016/j.ifacol.2025.03.020 apa: Kersting, L., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., & Walther, F. (2025). State-space modelling approach for control and observer design in property-controlled reverse flow forming. IFAC-PapersOnLine, 59(1), 109–114. https://doi.org/10.1016/j.ifacol.2025.03.020 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={10.1016/j.ifacol.2025.03.020}, 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} }' 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.” IFAC-PapersOnLine 59, no. 1 (2025): 109–14. https://doi.org/10.1016/j.ifacol.2025.03.020.' 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,” IFAC-PapersOnLine, vol. 59, no. 1, pp. 109–114, 2025, doi: 10.1016/j.ifacol.2025.03.020.' mla: Kersting, Lukas, et al. “State-Space Modelling Approach for Control and Observer Design in Property-Controlled Reverse Flow Forming.” IFAC-PapersOnLine, vol. 59, no. 1, Elsevier BV, 2025, pp. 109–14, doi:10.1016/j.ifacol.2025.03.020. short: L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, F. Walther, IFAC-PapersOnLine 59 (2025) 109–114. date_created: 2025-10-30T12:14:01Z date_updated: 2025-10-30T12:53:16Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.1016/j.ifacol.2025.03.020 intvolume: ' 59' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: 'https://doi.org/10.1016/j.ifacol.2025.03.020 ' oa: '1' page: 109-114 publication: IFAC-PapersOnLine publication_identifier: issn: - 2405-8963 publication_status: published publisher: Elsevier BV status: public title: State-space modelling approach for control and observer design in property-controlled reverse flow forming type: journal_article user_id: '82875' volume: 59 year: '2025' ... --- _id: '57190' abstract: - lang: eng 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. author: - first_name: 'Julian ' full_name: 'Rozo Vasquez, Julian ' last_name: Rozo Vasquez - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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: Lecture Notes in Mechanical Engineering. Springer International Publishing; 2024. doi:10.1007/978-3-031-58006-2_10' apa: Rozo Vasquez, J., Kersting, L., Arian, B., Homberg, W., Trächtler, A., & Walther, F. (2024). Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L. In Lecture Notes in Mechanical Engineering. Springer International Publishing. https://doi.org/10.1007/978-3-031-58006-2_10 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={10.1007/978-3-031-58006-2_10}, 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} }' 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 Lecture Notes in Mechanical Engineering. Cham: Springer International Publishing, 2024. https://doi.org/10.1007/978-3-031-58006-2_10.' 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 Lecture Notes in Mechanical Engineering, Cham: Springer International Publishing, 2024.' mla: Rozo Vasquez, Julian, et al. “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L.” Lecture Notes in Mechanical Engineering, Springer International Publishing, 2024, doi:10.1007/978-3-031-58006-2_10. 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.' date_created: 2024-11-18T10:24:06Z date_updated: 2024-11-18T10:39:03Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.1007/978-3-031-58006-2_10 language: - iso: eng place: Cham publication: Lecture Notes in Mechanical Engineering publication_identifier: isbn: - '9783031580055' - '9783031580062' issn: - 2195-4356 - 2195-4364 publication_status: published publisher: Springer International Publishing quality_controlled: '1' status: public title: Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L type: book_chapter user_id: '41470' year: '2024' ... --- _id: '57189' 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." author: - first_name: 'Julian ' full_name: 'Rozo Vasquez, Julian ' last_name: Rozo Vasquez - first_name: Hanigah full_name: Kanagarajah, Hanigah last_name: Kanagarajah - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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.' apa: Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., & Walther, F. (2024). Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L. 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} }' 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 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,” 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 AISI 304L. Authorea, Inc., 2024. short: 'J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, in: Authorea, Inc., 2024.' date_created: 2024-11-18T10:22:34Z date_updated: 2024-11-18T10:39:19Z department: - _id: '153' - _id: '241' - _id: '156' language: - iso: eng publication_status: published publisher: Authorea, Inc. quality_controlled: '1' status: public title: Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L type: conference user_id: '41470' year: '2024' ... --- _id: '57173' 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. author: - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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: Materials Research Proceedings. Vol 44. Materials Research Forum LLC; 2024. doi:10.21741/9781644903254-76' apa: Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., & Walther, F. (2024). α’-martensite grading techniques in reverse flow forming of AISI 304L. Materials Research Proceedings, 44. https://doi.org/10.21741/9781644903254-76 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={10.21741/9781644903254-76}, 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} }' 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 Materials Research Proceedings, Vol. 44. Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903254-76. 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 Materials Research Proceedings, 2024, vol. 44, doi: 10.21741/9781644903254-76.' mla: Arian, Bahman, et al. “α’-Martensite Grading Techniques in Reverse Flow Forming of AISI 304L.” Materials Research Proceedings, vol. 44, Materials Research Forum LLC, 2024, doi:10.21741/9781644903254-76. short: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.' date_created: 2024-11-18T10:06:17Z date_updated: 2024-11-18T10:42:55Z department: - _id: '241' - _id: '153' - _id: '156' doi: 10.21741/9781644903254-76 intvolume: ' 44' language: - iso: eng publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: α’-martensite grading techniques in reverse flow forming of AISI 304L type: conference user_id: '41470' volume: 44 year: '2024' ... --- _id: '57178' abstract: - lang: eng 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. author: - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Sebastian full_name: Sander, Sebastian last_name: Sander - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Frank full_name: Walther, Frank last_name: Walther citation: ama: 'Kersting L, Sander S, Arian B, et al. Improving the flow forming process by a novel closed-loop control. In: Materials Research Proceedings. Vol 41. Materials Research Forum LLC; 2024. doi:10.21741/9781644903131-158' apa: Kersting, L., Sander, S., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., & Walther, F. (2024). Improving the flow forming process by a novel closed-loop control. Materials Research Proceedings, 41. https://doi.org/10.21741/9781644903131-158 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={10.21741/9781644903131-158}, 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} }' 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 Materials Research Proceedings, Vol. 41. Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903131-158. ieee: 'L. Kersting et al., “Improving the flow forming process by a novel closed-loop control,” in Materials Research Proceedings, 2024, vol. 41, doi: 10.21741/9781644903131-158.' mla: Kersting, Lukas, et al. “Improving the Flow Forming Process by a Novel Closed-Loop Control.” Materials Research Proceedings, vol. 41, Materials Research Forum LLC, 2024, doi:10.21741/9781644903131-158. 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.' date_created: 2024-11-18T10:11:24Z date_updated: 2024-11-18T10:41:46Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.21741/9781644903131-158 intvolume: ' 41' language: - iso: eng publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: Improving the flow forming process by a novel closed-loop control type: conference user_id: '41470' volume: 41 year: '2024' ... --- _id: '57171' abstract: - lang: eng text: In manufacturing, property control ensures efficient part production. However, in reverse flow forming, current practices focus on geometry control rather than property control. To address the complexity of the process and tool machine interaction, process control is crucial for defined component properties. This study focuses on controlling local α’ martensite content in reverse flow forming of seamless AISI 304L steel tubes. Strategies and systems are presented to influence α’ martensite content, creating unique microstructure profiles for 1D and 2D Gradings, with tangible component outcomes. author: - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Frank full_name: Walther, Frank last_name: Walther citation: ama: 'Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. Thermomechanical reverse flow forming of AISI 304L. In: Materials Research Proceedings. Vol 41. Materials Research Forum LLC; 2024. doi:10.21741/9781644903131-151' apa: Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., & Walther, F. (2024). Thermomechanical reverse flow forming of AISI 304L. Materials Research Proceedings, 41. https://doi.org/10.21741/9781644903131-151 bibtex: '@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2024, title={Thermomechanical reverse flow forming of AISI 304L}, volume={41}, DOI={10.21741/9781644903131-151}, 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} }' chicago: Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian Rozo Vasquez, and Frank Walther. “Thermomechanical Reverse Flow Forming of AISI 304L.” In Materials Research Proceedings, Vol. 41. Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903131-151. ieee: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F. Walther, “Thermomechanical reverse flow forming of AISI 304L,” in Materials Research Proceedings, 2024, vol. 41, doi: 10.21741/9781644903131-151.' mla: Arian, Bahman, et al. “Thermomechanical Reverse Flow Forming of AISI 304L.” Materials Research Proceedings, vol. 41, Materials Research Forum LLC, 2024, doi:10.21741/9781644903131-151. short: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.' date_created: 2024-11-18T10:02:38Z date_updated: 2024-11-18T10:42:49Z department: - _id: '241' - _id: '153' - _id: '156' doi: 10.21741/9781644903131-151 intvolume: ' 41' language: - iso: eng publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: Thermomechanical reverse flow forming of AISI 304L type: conference user_id: '41470' volume: 41 year: '2024' ... --- _id: '62025' abstract: - lang: eng text: ABSTRACTThis 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. article_number: e13070 author: - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Hanigah full_name: Kanagarajah, Hanigah last_name: Kanagarajah - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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 <scp>AISI 304L</scp>. Engineering Reports. 2024;7(1). doi:10.1002/eng2.13070 apa: Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., & Walther, F. (2024). 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>. Engineering Reports, 7(1), Article e13070. https://doi.org/10.1002/eng2.13070 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 <scp>AISI 304L</scp>}, volume={7}, DOI={10.1002/eng2.13070}, 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} }' 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 <scp>AISI 304L</Scp>.” Engineering Reports 7, no. 1 (2024). https://doi.org/10.1002/eng2.13070. ieee: 'J. Rozo Vasquez et al., “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>,” Engineering Reports, vol. 7, no. 1, Art. no. e13070, 2024, doi: 10.1002/eng2.13070.' 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 <scp>AISI 304L</Scp>.” Engineering Reports, vol. 7, no. 1, e13070, Wiley, 2024, doi:10.1002/eng2.13070. short: J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, Engineering Reports 7 (2024). date_created: 2025-10-30T12:25:57Z date_updated: 2025-10-30T12:54:40Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.1002/eng2.13070 intvolume: ' 7' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1002/eng2.13070 oa: '1' publication: Engineering Reports publication_identifier: issn: - 2577-8196 - 2577-8196 publication_status: published publisher: Wiley status: public title: Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel AISI 304L type: journal_article user_id: '82875' volume: 7 year: '2024' ... --- _id: '62053' abstract: - lang: eng text: ABSTRACTThis 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. article_number: e13070 author: - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Hanigah full_name: Kanagarajah, Hanigah last_name: Kanagarajah - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Frank full_name: Walther, Frank last_name: Walther citation: 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 <scp>AISI 304L</scp>. Engineering Reports. 2024;7(1). doi:10.1002/eng2.13070 apa: Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., & Walther, F. (2024). 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>. Engineering Reports, 7(1), Article e13070. https://doi.org/10.1002/eng2.13070 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 <scp>AISI 304L</scp>}, volume={7}, DOI={10.1002/eng2.13070}, 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} }' 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 <scp>AISI 304L</Scp>.” Engineering Reports 7, no. 1 (2024). https://doi.org/10.1002/eng2.13070. ieee: 'J. Rozo Vasquez et al., “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>,” Engineering Reports, vol. 7, no. 1, Art. no. e13070, 2024, doi: 10.1002/eng2.13070.' 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 <scp>AISI 304L</Scp>.” Engineering Reports, vol. 7, no. 1, e13070, Wiley, 2024, doi:10.1002/eng2.13070. short: J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, Engineering Reports 7 (2024). date_created: 2025-11-03T10:28:12Z date_updated: 2025-11-03T10:29:18Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.1002/eng2.13070 intvolume: ' 7' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1002/eng2.13070 oa: '1' publication: Engineering Reports publication_identifier: issn: - 2577-8196 - 2577-8196 publication_status: published publisher: Wiley status: public title: Barkhausen Noise‐ and Eddy Current‐Based Measurements for Online Detection of Deformation‐Induced Martensite During Flow Forming of Metastable Austenitic Steel AISI 304L type: journal_article user_id: '82875' volume: 7 year: '2024' ... --- _id: '44316' author: - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Frank full_name: Walther, Frank last_name: Walther - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler citation: ama: 'Rozo Vasquez J, Arian B, Kersting L, Walther F, Homberg W, Trächtler A. Softsensor model of phase transformation during flow forming of metastable austenitic steel AISI 304L. In: ; 2023.' apa: Rozo Vasquez, J., Arian, B., Kersting, L., Walther, F., Homberg, W., & Trächtler, A. (2023). Softsensor model of phase transformation during flow forming of metastable austenitic steel AISI 304L. The 14th International Conference on Numerical Methods in Industrial Forming Processes (Numiform 2023), Krakau. bibtex: '@inproceedings{Rozo Vasquez_Arian_Kersting_Walther_Homberg_Trächtler_2023, title={Softsensor model of phase transformation during flow forming of metastable austenitic steel AISI 304L}, author={Rozo Vasquez, Julian and Arian, Bahman and Kersting, Lukas and Walther, Frank and Homberg, Werner and Trächtler, Ansgar}, year={2023} }' chicago: Rozo Vasquez, Julian, Bahman Arian, Lukas Kersting, Frank Walther, Werner Homberg, and Ansgar Trächtler. “Softsensor Model of Phase Transformation during Flow Forming of Metastable Austenitic Steel AISI 304L,” 2023. ieee: J. Rozo Vasquez, B. Arian, L. Kersting, F. Walther, W. Homberg, and A. Trächtler, “Softsensor model of phase transformation during flow forming of metastable austenitic steel AISI 304L,” presented at the The 14th International Conference on Numerical Methods in Industrial Forming Processes (Numiform 2023), Krakau, 2023. mla: Rozo Vasquez, Julian, et al. Softsensor Model of Phase Transformation during Flow Forming of Metastable Austenitic Steel AISI 304L. 2023. short: 'J. Rozo Vasquez, B. Arian, L. Kersting, F. Walther, W. Homberg, A. Trächtler, in: 2023.' conference: end_date: 2023-06-29 location: Krakau name: The 14th International Conference on Numerical Methods in Industrial Forming Processes (Numiform 2023) start_date: 2023-06-25 date_created: 2023-05-02T09:56:46Z date_updated: 2023-11-07T00:01:46Z department: - _id: '156' - _id: '241' - _id: '153' language: - iso: eng quality_controlled: '1' status: public title: Softsensor model of phase transformation during flow forming of metastable austenitic steel AISI 304L type: conference user_id: '14931' year: '2023' ... --- _id: '44314' abstract: - lang: eng text: Abstract. Workpiece property-control permits the application-oriented and time-efficient production of components. In reverse flow forming, for example, a control of the microstructure profile is not yet part of the state of the art, in contrast to the geometry control. This is, due to several reasons, particularly challenging when forming seamless tubes made of metastable austenitic stainless AISI 304L steel. Inducing mechanical and/or thermal energy can cause a phase transformation from austenite to martensite within this steel. The resulting α’-martensite has different mechanical and micromagnetic properties, which can be advantageous depending on the application. For purposes of local property control, the resulting α’-martensite content should be measured and controlled online during the forming process. This paper presents results from the usage of a custom developed cryo-system and different application strategies to use liquid nitrogen as a coolant for local enhancement of the forming-temperature depending α’-martensite content. author: - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Frank full_name: Walther, Frank last_name: Walther citation: ama: 'Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. Cryogenic reverse flow forming of AISI 304L. In: Materials Research Proceedings. Materials Research Forum LLC; 2023. doi:10.21741/9781644902479-219' apa: Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., & Walther, F. (2023). Cryogenic reverse flow forming of AISI 304L. Materials Research Proceedings. https://doi.org/10.21741/9781644902479-219 bibtex: '@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2023, title={Cryogenic reverse flow forming of AISI 304L}, DOI={10.21741/9781644902479-219}, 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={2023} }' chicago: Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian Rozo Vasquez, and Frank Walther. “Cryogenic Reverse Flow Forming of AISI 304L.” In Materials Research Proceedings. Materials Research Forum LLC, 2023. https://doi.org/10.21741/9781644902479-219. ieee: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F. Walther, “Cryogenic reverse flow forming of AISI 304L,” 2023, doi: 10.21741/9781644902479-219.' mla: Arian, Bahman, et al. “Cryogenic Reverse Flow Forming of AISI 304L.” Materials Research Proceedings, Materials Research Forum LLC, 2023, doi:10.21741/9781644902479-219. short: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC, 2023.' date_created: 2023-05-02T09:43:25Z date_updated: 2023-12-15T09:32:05Z department: - _id: '156' - _id: '241' - _id: '153' doi: 10.21741/9781644902479-219 language: - iso: eng main_file_link: - open_access: '1' url: https://www.mrforum.com/product/9781644902479-219/ oa: '1' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: Cryogenic reverse flow forming of AISI 304L type: conference user_id: '36287' year: '2023' ... --- _id: '49705' author: - first_name: Sophie Charlotte full_name: Stebner, Sophie Charlotte last_name: Stebner - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Juri full_name: Martschin, Juri last_name: Martschin - first_name: Stefan full_name: Dietrich, Stefan last_name: Dietrich - first_name: Martin full_name: Feistle, Martin last_name: Feistle - first_name: Sebastian full_name: Hütter, Sebastian last_name: Hütter - first_name: Rémi full_name: Lafarge, Rémi last_name: Lafarge - first_name: Robert full_name: Laue, Robert last_name: Laue - first_name: Xinyang full_name: Li, Xinyang last_name: Li - first_name: Christopher full_name: Schulte, Christopher last_name: Schulte - first_name: Daniel full_name: Spies, Daniel last_name: Spies - first_name: Ferdinand full_name: Thein, Ferdinand last_name: Thein - first_name: Frank full_name: Wendler, Frank last_name: Wendler - first_name: Malte full_name: Wrobel, Malte last_name: Wrobel - first_name: Julian Rozo full_name: Vasquez, Julian Rozo last_name: Vasquez - first_name: Michael full_name: Dölz, Michael last_name: Dölz - first_name: Sebastian full_name: Münstermann, Sebastian last_name: Münstermann citation: ama: 'Stebner SC, Arian B, Martschin J, et al. Monitoring the evolution of dimensional accuracy and product properties in property-controlled forming processes. Electrical Engineering: Systems and Control. Published online 2023. doi:10.48550/ARXIV.2305.19601' apa: 'Stebner, S. C., Arian, B., Martschin, J., Dietrich, S., Feistle, M., Hütter, S., Lafarge, R., Laue, R., Li, X., Schulte, C., Spies, D., Thein, F., Wendler, F., Wrobel, M., Vasquez, J. R., Dölz, M., & Münstermann, S. (2023). Monitoring the evolution of dimensional accuracy and product properties in property-controlled forming processes. Electrical Engineering: Systems and Control. https://doi.org/10.48550/ARXIV.2305.19601' bibtex: '@article{Stebner_Arian_Martschin_Dietrich_Feistle_Hütter_Lafarge_Laue_Li_Schulte_et al._2023, title={Monitoring the evolution of dimensional accuracy and product properties in property-controlled forming processes}, DOI={10.48550/ARXIV.2305.19601}, journal={Electrical Engineering: Systems and Control}, author={Stebner, Sophie Charlotte and Arian, Bahman and Martschin, Juri and Dietrich, Stefan and Feistle, Martin and Hütter, Sebastian and Lafarge, Rémi and Laue, Robert and Li, Xinyang and Schulte, Christopher and et al.}, year={2023} }' chicago: 'Stebner, Sophie Charlotte, Bahman Arian, Juri Martschin, Stefan Dietrich, Martin Feistle, Sebastian Hütter, Rémi Lafarge, et al. “Monitoring the Evolution of Dimensional Accuracy and Product Properties in Property-Controlled Forming Processes.” Electrical Engineering: Systems and Control, 2023. https://doi.org/10.48550/ARXIV.2305.19601.' ieee: 'S. C. Stebner et al., “Monitoring the evolution of dimensional accuracy and product properties in property-controlled forming processes,” Electrical Engineering: Systems and Control, 2023, doi: 10.48550/ARXIV.2305.19601.' mla: 'Stebner, Sophie Charlotte, et al. “Monitoring the Evolution of Dimensional Accuracy and Product Properties in Property-Controlled Forming Processes.” Electrical Engineering: Systems and Control, 2023, doi:10.48550/ARXIV.2305.19601.' short: 'S.C. Stebner, B. Arian, J. Martschin, S. Dietrich, M. Feistle, S. Hütter, R. Lafarge, R. Laue, X. Li, C. Schulte, D. Spies, F. Thein, F. Wendler, M. Wrobel, J.R. Vasquez, M. Dölz, S. Münstermann, Electrical Engineering: Systems and Control (2023).' date_created: 2023-12-15T12:33:21Z date_updated: 2023-12-15T12:39:55Z doi: 10.48550/ARXIV.2305.19601 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2305.19601 oa: '1' publication: 'Electrical Engineering: Systems and Control' quality_controlled: '1' status: public title: Monitoring the evolution of dimensional accuracy and product properties in property-controlled forming processes type: journal_article user_id: '36287' year: '2023' ... --- _id: '48075' abstract: - lang: eng text: AbstractThe constantly increasing challenges of production technology for the economic and resource-saving production of metallic workpieces require, among other things, the optimisation of existing processes. Forming technology, which is confronted with new challenges regarding the quality of the workpieces, must also organise the individual processes more efficiently and at the same time more reliably in order to be able to guarantee good workpiece quality and at the same time to be able to produce economically. One way to meet these challenges is to carry out the forming processes in closed-loop control systems using softsensors. Despite the many potential applications of softsensors in the field of forming technology, there is still no definition of the term softsensor. This publication therefore proposes a definition of the softsensor based on the definition of a sensor and the distinction from the observer, which on the one hand is intended to stimulate scientific discourse and on the other hand is also intended to form the basis for further scientific work. Based on this definition, a wide variety of highly topical application examples of various softsensors in the field of forming technology are given. article_type: original author: - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Viktor full_name: Arne, Viktor last_name: Arne - first_name: Thomas full_name: Borgert, Thomas id: '83141' last_name: Borgert - first_name: Alexander full_name: Brosius, Alexander last_name: Brosius - first_name: Peter full_name: Groche, Peter last_name: Groche - first_name: Christoph full_name: Hartmann, Christoph last_name: Hartmann - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Robert full_name: Laue, Robert last_name: Laue - first_name: Juri full_name: Martschin, Juri last_name: Martschin - first_name: Thomas full_name: Meurer, Thomas last_name: Meurer - first_name: Daniel full_name: Spies, Daniel last_name: Spies - first_name: A. Erman full_name: Tekkaya, A. Erman last_name: Tekkaya - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Wolfram full_name: Volk, Wolfram last_name: Volk - first_name: Frank full_name: Wendler, Frank last_name: Wendler - first_name: Malte full_name: Wrobel, Malte last_name: Wrobel citation: ama: 'Homberg W, Arian B, Arne V, et al. Softsensors: key component of property control in forming technology. Production Engineering. Published online 2023. doi:10.1007/s11740-023-01227-1' apa: 'Homberg, W., Arian, B., Arne, V., Borgert, T., Brosius, A., Groche, P., Hartmann, C., Kersting, L., Laue, R., Martschin, J., Meurer, T., Spies, D., Tekkaya, A. E., Trächtler, A., Volk, W., Wendler, F., & Wrobel, M. (2023). Softsensors: key component of property control in forming technology. Production Engineering. https://doi.org/10.1007/s11740-023-01227-1' bibtex: '@article{Homberg_Arian_Arne_Borgert_Brosius_Groche_Hartmann_Kersting_Laue_Martschin_et al._2023, title={Softsensors: key component of property control in forming technology}, DOI={10.1007/s11740-023-01227-1}, journal={Production Engineering}, publisher={Springer Science and Business Media LLC}, author={Homberg, Werner and Arian, Bahman and Arne, Viktor and Borgert, Thomas and Brosius, Alexander and Groche, Peter and Hartmann, Christoph and Kersting, Lukas and Laue, Robert and Martschin, Juri and et al.}, year={2023} }' chicago: 'Homberg, Werner, Bahman Arian, Viktor Arne, Thomas Borgert, Alexander Brosius, Peter Groche, Christoph Hartmann, et al. “Softsensors: Key Component of Property Control in Forming Technology.” Production Engineering, 2023. https://doi.org/10.1007/s11740-023-01227-1.' ieee: 'W. Homberg et al., “Softsensors: key component of property control in forming technology,” Production Engineering, 2023, doi: 10.1007/s11740-023-01227-1.' mla: 'Homberg, Werner, et al. “Softsensors: Key Component of Property Control in Forming Technology.” Production Engineering, Springer Science and Business Media LLC, 2023, doi:10.1007/s11740-023-01227-1.' short: W. Homberg, B. Arian, V. Arne, T. Borgert, A. Brosius, P. Groche, C. Hartmann, L. Kersting, R. Laue, J. Martschin, T. Meurer, D. Spies, A.E. Tekkaya, A. Trächtler, W. Volk, F. Wendler, M. Wrobel, Production Engineering (2023). date_created: 2023-10-16T07:17:17Z date_updated: 2023-12-22T10:56:58Z department: - _id: '156' - _id: '153' - _id: '241' doi: 10.1007/s11740-023-01227-1 keyword: - Industrial and Manufacturing Engineering - Mechanical Engineering language: - iso: eng main_file_link: - open_access: '1' url: https://link.springer.com/article/10.1007/s11740-023-01227-1 oa: '1' publication: Production Engineering publication_identifier: issn: - 0944-6524 - 1863-7353 publication_status: published publisher: Springer Science and Business Media LLC quality_controlled: '1' status: public title: 'Softsensors: key component of property control in forming technology' type: journal_article user_id: '14931' year: '2023' ... --- _id: '44312' abstract: - lang: eng text: "Zusammenfassung\r\n Aufgrund aktueller Transformationsprozesse kommt der automatisierten und ressourceneffizienten Fertigung hochfester Leichtbauteile eine steigende Bedeutung zu, beispielsweise im Flugzeug- und Fahrzeugbau. Für kleine Losgrößen bietet sich hier insbesondere das Fertigungsverfahren des Drückwalzens an. Der konventionelle, industriell genutzte Drückwalzprozess stößt allerdings aufgrund der Prozesskomplexität hinsichtlich der Reproduzierbarkeit an seine Grenzen. Dies wird in der Praxis teilweise durch personengebundenes Erfahrungswissen kompensiert. Auch ist es nicht möglich, Bauteileigenschaften definiert einzustellen. Aus diesem Grund bietet der Einsatz einer neuartigen Eigenschaftsregelung Chancen zur Weiterentwicklung des Fertigungsprozesses und die Möglichkeit zur Prozessautomatisierung. Hier werden die Werkzeugbahnen abhängig einer Online-Eigenschaftsmessung über eine zusätzliche Reglerkaskade manipuliert. Die Entwicklung einer solchen Eigenschaftsregelung erfordert den Einsatz geeigneter, modellbasierter Entwurfsmethoden. In diesem Beitrag wird daher ein regelungstechnisches Systemmodell für das Drückwalzen metastabiler austenitischer Edelstähle vorgestellt. Das Simulationsmodell weist aufgrund seiner Echtzeitfähigkeit neben dem Einsatz als reines Entwurfsmodell weitere Nutzungsmöglichkeiten z.B. in Beobachtern auf und grenzt sich somit von domänenspezifischen Simulationstools wie der FEM ab." author: - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Frank full_name: Walther, Frank last_name: Walther citation: ama: Kersting L, Arian B, Rozo Vasquez J, Trächtler A, Homberg W, Walther F. Echtzeitfähige Modellierung eines innovativen Drückwalzprozesses für die eigenschaftsgeregelte Bauteilfertigung. at - Automatisierungstechnik. 2023;71(1):68-81. doi:10.1515/auto-2022-0106 apa: Kersting, L., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., & Walther, F. (2023). Echtzeitfähige Modellierung eines innovativen Drückwalzprozesses für die eigenschaftsgeregelte Bauteilfertigung. At - Automatisierungstechnik, 71(1), 68–81. https://doi.org/10.1515/auto-2022-0106 bibtex: '@article{Kersting_Arian_Rozo Vasquez_Trächtler_Homberg_Walther_2023, title={Echtzeitfähige Modellierung eines innovativen Drückwalzprozesses für die eigenschaftsgeregelte Bauteilfertigung}, volume={71}, DOI={10.1515/auto-2022-0106}, number={1}, 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={2023}, pages={68–81} }' chicago: 'Kersting, Lukas, Bahman Arian, Julian Rozo Vasquez, Ansgar Trächtler, Werner Homberg, and Frank Walther. “Echtzeitfähige Modellierung Eines Innovativen Drückwalzprozesses Für Die Eigenschaftsgeregelte Bauteilfertigung.” At - Automatisierungstechnik 71, no. 1 (2023): 68–81. https://doi.org/10.1515/auto-2022-0106.' ieee: 'L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, and F. Walther, “Echtzeitfähige Modellierung eines innovativen Drückwalzprozesses für die eigenschaftsgeregelte Bauteilfertigung,” at - Automatisierungstechnik, vol. 71, no. 1, pp. 68–81, 2023, doi: 10.1515/auto-2022-0106.' mla: Kersting, Lukas, et al. “Echtzeitfähige Modellierung Eines Innovativen Drückwalzprozesses Für Die Eigenschaftsgeregelte Bauteilfertigung.” At - Automatisierungstechnik, vol. 71, no. 1, Walter de Gruyter GmbH, 2023, pp. 68–81, doi:10.1515/auto-2022-0106. short: L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, F. Walther, At - Automatisierungstechnik 71 (2023) 68–81. date_created: 2023-05-02T09:35:01Z date_updated: 2023-09-25T10:08:25Z department: - _id: '156' - _id: '241' - _id: '153' doi: 10.1515/auto-2022-0106 intvolume: ' 71' issue: '1' keyword: - Electrical and Electronic Engineering - Computer Science Applications - Control and Systems Engineering language: - iso: eng page: 68-81 publication: at - Automatisierungstechnik publication_identifier: issn: - 0178-2312 - 2196-677X publication_status: published publisher: Walter de Gruyter GmbH quality_controlled: '1' status: public title: Echtzeitfähige Modellierung eines innovativen Drückwalzprozesses für die eigenschaftsgeregelte Bauteilfertigung type: journal_article user_id: '552' volume: 71 year: '2023' ... --- _id: '44315' abstract: - lang: eng text: Abstract. Climate change, rare resources and industrial transformation processes lead to a rising demand of multi-complex lightweight forming parts, especially in aerospace and automotive sectors. In these industries, flow forming is often used to produce cylindrical forming parts by reducing the wall thickness of tubular semifinished parts, e.g. for the production of hydraulic cylinders or gear shafts. The complexity and functionality of flow forming workpieces could be significantly increased by locally graded microstructure and geometry structures. This enables customized complex hardness distributions at wear surfaces or magnetic QR codes for a unique, tamper-proof product identification. The production of those complex, 2D (axial and angular) graded forming parts currently depicts a great challenge for the process and requires new solutions and strategies. Hence, this paper proposes a novel control strategy that includes online measurements from an absolute encoder to determine the angular workpiece position. Workpieces of AISI 304L stainless steel with 2D-graded structures are successfully manufactured using this new strategy and analyzed regarding the possible accuracy and resolution of the gradation. At this point, a dependency of the gradations on the sensor and actuator dynamics, accuracy and geometry could be noted. It is further evaluated how the control strategy could be extended by an observer-based closed-loop property control approach to enhance the accuracy of the suggested strategy. author: - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Frank full_name: Walther, Frank last_name: Walther citation: ama: 'Kersting L, Arian B, Rozo Vasquez J, Trächtler A, Homberg W, Walther F. Control strategy for angular gradations by means of the flow forming process. In: Materials Research Proceedings. Materials Research Forum LLC; 2023. doi:10.21741/9781644902479-220' apa: Kersting, L., Arian, B., Rozo Vasquez, J., Trächtler, A., Homberg, W., & Walther, F. (2023). Control strategy for angular gradations by means of the flow forming process. Materials Research Proceedings. https://doi.org/10.21741/9781644902479-220 bibtex: '@inproceedings{Kersting_Arian_Rozo Vasquez_Trächtler_Homberg_Walther_2023, title={Control strategy for angular gradations by means of the flow forming process}, DOI={10.21741/9781644902479-220}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Kersting, Lukas and Arian, Bahman and Rozo Vasquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}, year={2023} }' chicago: Kersting, Lukas, Bahman Arian, Julian Rozo Vasquez, Ansgar Trächtler, Werner Homberg, and Frank Walther. “Control Strategy for Angular Gradations by Means of the Flow Forming Process.” In Materials Research Proceedings. Materials Research Forum LLC, 2023. https://doi.org/10.21741/9781644902479-220. ieee: 'L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, and F. Walther, “Control strategy for angular gradations by means of the flow forming process,” 2023, doi: 10.21741/9781644902479-220.' mla: Kersting, Lukas, et al. “Control Strategy for Angular Gradations by Means of the Flow Forming Process.” Materials Research Proceedings, Materials Research Forum LLC, 2023, doi:10.21741/9781644902479-220. short: 'L. Kersting, B. Arian, J. Rozo Vasquez, A. Trächtler, W. Homberg, F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC, 2023.' date_created: 2023-05-02T09:46:20Z date_updated: 2023-09-25T10:09:06Z department: - _id: '156' - _id: '241' - _id: '153' doi: 10.21741/9781644902479-220 language: - iso: eng publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: Control strategy for angular gradations by means of the flow forming process type: conference user_id: '552' year: '2023' ... --- _id: '44318' author: - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Frank full_name: Walther, Frank last_name: Walther - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler citation: ama: Rozo Vasquez J, Arian B, Kersting L, Walther F, Homberg W, Trächtler A. Detection of phase transformation during plastic deformation of metastable austenitic steel AISI 304L by means of X-ray diffraction pattern analysis. Metals. Published online 2023. apa: Rozo Vasquez, J., Arian, B., Kersting, L., Walther, F., Homberg, W., & Trächtler, A. (2023). Detection of phase transformation during plastic deformation of metastable austenitic steel AISI 304L by means of X-ray diffraction pattern analysis. Metals. bibtex: '@article{Rozo Vasquez_Arian_Kersting_Walther_Homberg_Trächtler_2023, title={Detection of phase transformation during plastic deformation of metastable austenitic steel AISI 304L by means of X-ray diffraction pattern analysis}, journal={Metals}, author={Rozo Vasquez, Julian and Arian, Bahman and Kersting, Lukas and Walther, Frank and Homberg, Werner and Trächtler, Ansgar}, year={2023} }' chicago: Rozo Vasquez, Julian, Bahman Arian, Lukas Kersting, Frank Walther, Werner Homberg, and Ansgar Trächtler. “Detection of Phase Transformation during Plastic Deformation of Metastable Austenitic Steel AISI 304L by Means of X-Ray Diffraction Pattern Analysis.” Metals, 2023. ieee: J. Rozo Vasquez, B. Arian, L. Kersting, F. Walther, W. Homberg, and A. Trächtler, “Detection of phase transformation during plastic deformation of metastable austenitic steel AISI 304L by means of X-ray diffraction pattern analysis,” Metals, 2023. mla: Rozo Vasquez, Julian, et al. “Detection of Phase Transformation during Plastic Deformation of Metastable Austenitic Steel AISI 304L by Means of X-Ray Diffraction Pattern Analysis.” Metals, 2023. short: J. Rozo Vasquez, B. Arian, L. Kersting, F. Walther, W. Homberg, A. Trächtler, Metals (2023). date_created: 2023-05-02T10:07:29Z date_updated: 2023-09-25T10:10:05Z department: - _id: '156' - _id: '241' - _id: '153' language: - iso: eng publication: Metals quality_controlled: '1' status: public title: Detection of phase transformation during plastic deformation of metastable austenitic steel AISI 304L by means of X-ray diffraction pattern analysis type: journal_article user_id: '552' year: '2023' ... --- _id: '34001' author: - first_name: Bahman full_name: Arian, Bahman id: '36287' last_name: Arian - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Lukas full_name: Kersting, Lukas last_name: Kersting - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Julian full_name: Rozo Vasquez, Julian last_name: Rozo Vasquez citation: ama: 'Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J. Produktkennzeichnung durch lokal definierte Einstellung von ferromagnetischen Eigenschaften beim Drückwalzen von metastabilen Stahlwerkstoffen. In: 36. Aachener Stahlkolloquium – Umformtechnik “Ideen Form Geben“. ; 2022:333-347.' apa: Arian, B., Homberg, W., Kersting, L., Trächtler, A., & Rozo Vasquez, J. (2022). Produktkennzeichnung durch lokal definierte Einstellung von ferromagnetischen Eigenschaften beim Drückwalzen von metastabilen Stahlwerkstoffen. 36. Aachener Stahlkolloquium – Umformtechnik “Ideen Form Geben“, 333–347. bibtex: '@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_2022, place={Aachen}, title={Produktkennzeichnung durch lokal definierte Einstellung von ferromagnetischen Eigenschaften beim Drückwalzen von metastabilen Stahlwerkstoffen}, booktitle={36. Aachener Stahlkolloquium – Umformtechnik “Ideen Form geben“}, author={Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler, Ansgar and Rozo Vasquez, Julian}, year={2022}, pages={333–347} }' chicago: Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, and Julian Rozo Vasquez. “Produktkennzeichnung Durch Lokal Definierte Einstellung von Ferromagnetischen Eigenschaften Beim Drückwalzen von Metastabilen Stahlwerkstoffen.” In 36. Aachener Stahlkolloquium – Umformtechnik “Ideen Form Geben“, 333–47. Aachen, 2022. ieee: B. Arian, W. Homberg, L. Kersting, A. Trächtler, and J. Rozo Vasquez, “Produktkennzeichnung durch lokal definierte Einstellung von ferromagnetischen Eigenschaften beim Drückwalzen von metastabilen Stahlwerkstoffen,” in 36. Aachener Stahlkolloquium – Umformtechnik “Ideen Form geben“, 2022, pp. 333–347. mla: Arian, Bahman, et al. “Produktkennzeichnung Durch Lokal Definierte Einstellung von Ferromagnetischen Eigenschaften Beim Drückwalzen von Metastabilen Stahlwerkstoffen.” 36. Aachener Stahlkolloquium – Umformtechnik “Ideen Form Geben“, 2022, pp. 333–47. short: 'B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, in: 36. Aachener Stahlkolloquium – Umformtechnik “Ideen Form Geben“, Aachen, 2022, pp. 333–347.' date_created: 2022-11-04T08:35:03Z date_updated: 2023-12-15T09:38:08Z department: - _id: '156' - _id: '153' - _id: '241' language: - iso: eng main_file_link: - open_access: '1' oa: '1' page: 333-347 place: Aachen publication: 36. Aachener Stahlkolloquium – Umformtechnik “Ideen Form geben“ publication_identifier: isbn: - 978-3-95886-460-3 quality_controlled: '1' status: public title: Produktkennzeichnung durch lokal definierte Einstellung von ferromagnetischen Eigenschaften beim Drückwalzen von metastabilen Stahlwerkstoffen type: conference user_id: '36287' year: '2022' ...