--- _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: '57183' abstract: - lang: eng text: In multi-stage bending and straightening operations cross-stage and quantity-dependent effects crucially affect the quality of the end product. Using punch-bending units in combination with a mechatronic straightening device can improve the accuracy and repeatability of product features remarkably well. In this work a concept for an innovative hybrid model of a roll straightener in a multi-stage straightening and multi-stage bending process is proposed. This model combines data-driven elements with expert knowledge and aims to minimise residual errors of the roll straightener to reliably decrease the risk of disadvantageous cross-stage and quantity-dependent effects on a subsequent punch-bending process. author: - first_name: Henning full_name: Peters, Henning last_name: Peters - first_name: Eugen full_name: Djakow, Eugen id: '7904' last_name: Djakow - first_name: Tim full_name: Rostek, Tim id: '3469' last_name: Rostek - first_name: Andreas full_name: Mazur, Andreas last_name: Mazur - 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: Barbara full_name: Hammer, Barbara last_name: Hammer citation: ama: 'Peters H, Djakow E, Rostek T, et al. Novel approach for data-driven modelling of multi-stage straightening and bending processes. In: Materials Research Proceedings. Vol 41. Materials Research Forum LLC; 2024. doi:10.21741/9781644903131-252' apa: Peters, H., Djakow, E., Rostek, T., Mazur, A., Trächtler, A., Homberg, W., & Hammer, B. (2024). Novel approach for data-driven modelling of multi-stage straightening and bending processes. Materials Research Proceedings, 41. https://doi.org/10.21741/9781644903131-252 bibtex: '@inproceedings{Peters_Djakow_Rostek_Mazur_Trächtler_Homberg_Hammer_2024, title={Novel approach for data-driven modelling of multi-stage straightening and bending processes}, volume={41}, DOI={10.21741/9781644903131-252}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Peters, Henning and Djakow, Eugen and Rostek, Tim and Mazur, Andreas and Trächtler, Ansgar and Homberg, Werner and Hammer, Barbara}, year={2024} }' chicago: Peters, Henning, Eugen Djakow, Tim Rostek, Andreas Mazur, Ansgar Trächtler, Werner Homberg, and Barbara Hammer. “Novel Approach for Data-Driven Modelling of Multi-Stage Straightening and Bending Processes.” In Materials Research Proceedings, Vol. 41. Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903131-252. ieee: 'H. Peters et al., “Novel approach for data-driven modelling of multi-stage straightening and bending processes,” in Materials Research Proceedings, 2024, vol. 41, doi: 10.21741/9781644903131-252.' mla: Peters, Henning, et al. “Novel Approach for Data-Driven Modelling of Multi-Stage Straightening and Bending Processes.” Materials Research Proceedings, vol. 41, Materials Research Forum LLC, 2024, doi:10.21741/9781644903131-252. short: 'H. Peters, E. Djakow, T. Rostek, A. Mazur, A. Trächtler, W. Homberg, B. Hammer, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.' date_created: 2024-11-18T10:15:37Z date_updated: 2024-11-18T10:40:50Z department: - _id: '153' - _id: '241' - _id: '156' doi: 10.21741/9781644903131-252 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: Novel approach for data-driven modelling of multi-stage straightening and bending processes 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: '54650' abstract: - lang: eng text: Abstract. Reducing the weight of vehicles can significantly lower the energy or fuel consumed and thus the emissions during operation. One possibility to assess this is the use of a property adapted multi-material systems containing high strength steel, light metals like aluminium or magnesium and fibre reinforced plastics. While expanding the number of materials used new challenges arise for the production and furthermore the joining technology to manufacture the vehicle made of the multi-material systems. One approach to overcome these challenges is to use innovative and adaptable joining techniques which allows the manufacturing of joints of different material combinations. Extensive research activities on the two stage thermo-mechanical joining process with adaptable joining elements was able to demonstrate the great potentials in terms of joining dissimilar materials with good strength. The previously kinematic and path-based fabrication of auxiliary joining elements is modified in this publication to a form-based approach with a perspective of establishing an efficient process chain using easily and cheaply available rods. Based on the new approach to produce the auxiliary joining elements, it can be demonstrated that a reproducible production of the geometry is possible for the investigated steel as well as aluminium material. author: - first_name: Thomas full_name: Borgert, Thomas id: '83141' last_name: Borgert - first_name: Ansgar Bernhard full_name: Nordieker, Ansgar Bernhard id: '88725' last_name: Nordieker - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg citation: ama: 'Borgert T, Nordieker AB, Homberg W. Form-based manufacturing of aluminium and steel auxiliary joining elements as the basis for an efficient joining operation. In: Materials Research Proceedings. Materials Research Forum LLC; 2024. doi:10.21741/9781644903131-180' apa: Borgert, T., Nordieker, A. B., & Homberg, W. (2024). Form-based manufacturing of aluminium and steel auxiliary joining elements as the basis for an efficient joining operation. Materials Research Proceedings. ESAFORM 2024, Toulouse. https://doi.org/10.21741/9781644903131-180 bibtex: '@inproceedings{Borgert_Nordieker_Homberg_2024, title={Form-based manufacturing of aluminium and steel auxiliary joining elements as the basis for an efficient joining operation}, DOI={10.21741/9781644903131-180}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Borgert, Thomas and Nordieker, Ansgar Bernhard and Homberg, Werner}, year={2024} }' chicago: Borgert, Thomas, Ansgar Bernhard Nordieker, and Werner Homberg. “Form-Based Manufacturing of Aluminium and Steel Auxiliary Joining Elements as the Basis for an Efficient Joining Operation.” In Materials Research Proceedings. Materials Research Forum LLC, 2024. https://doi.org/10.21741/9781644903131-180. ieee: 'T. Borgert, A. B. Nordieker, and W. Homberg, “Form-based manufacturing of aluminium and steel auxiliary joining elements as the basis for an efficient joining operation,” presented at the ESAFORM 2024, Toulouse, 2024, doi: 10.21741/9781644903131-180.' mla: Borgert, Thomas, et al. “Form-Based Manufacturing of Aluminium and Steel Auxiliary Joining Elements as the Basis for an Efficient Joining Operation.” Materials Research Proceedings, Materials Research Forum LLC, 2024, doi:10.21741/9781644903131-180. short: 'T. Borgert, A.B. Nordieker, W. Homberg, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.' conference: location: Toulouse name: ESAFORM 2024 date_created: 2024-06-07T09:38:45Z date_updated: 2025-09-22T05:45:37Z department: - _id: '156' doi: 10.21741/9781644903131-180 language: - iso: eng project: - _id: '133' name: TRR 285 - Project Area C - _id: '147' name: TRR 285 - Subproject C03 publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC status: public title: Form-based manufacturing of aluminium and steel auxiliary joining elements as the basis for an efficient joining operation type: conference user_id: '88725' year: '2024' ... --- _id: '54649' article_number: '100185' author: - first_name: Thomas full_name: Borgert, Thomas id: '83141' last_name: Borgert - first_name: Ansgar Bernhard full_name: Nordieker, Ansgar Bernhard id: '88725' last_name: Nordieker - first_name: Eugen full_name: Wiens, Eugen id: '7888' last_name: Wiens - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg citation: ama: Borgert T, Nordieker AB, Wiens E, Homberg W. Investigations to improve the tool life during thermomechanical and incremental forming of steel auxiliary joining elements. Journal of Advanced Joining Processes. 2024;9. doi:10.1016/j.jajp.2024.100185 apa: Borgert, T., Nordieker, A. B., Wiens, E., & Homberg, W. (2024). Investigations to improve the tool life during thermomechanical and incremental forming of steel auxiliary joining elements. Journal of Advanced Joining Processes, 9, Article 100185. https://doi.org/10.1016/j.jajp.2024.100185 bibtex: '@article{Borgert_Nordieker_Wiens_Homberg_2024, title={Investigations to improve the tool life during thermomechanical and incremental forming of steel auxiliary joining elements}, volume={9}, DOI={10.1016/j.jajp.2024.100185}, number={100185}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier BV}, author={Borgert, Thomas and Nordieker, Ansgar Bernhard and Wiens, Eugen and Homberg, Werner}, year={2024} }' chicago: Borgert, Thomas, Ansgar Bernhard Nordieker, Eugen Wiens, and Werner Homberg. “Investigations to Improve the Tool Life during Thermomechanical and Incremental Forming of Steel Auxiliary Joining Elements.” Journal of Advanced Joining Processes 9 (2024). https://doi.org/10.1016/j.jajp.2024.100185. ieee: 'T. Borgert, A. B. Nordieker, E. Wiens, and W. Homberg, “Investigations to improve the tool life during thermomechanical and incremental forming of steel auxiliary joining elements,” Journal of Advanced Joining Processes, vol. 9, Art. no. 100185, 2024, doi: 10.1016/j.jajp.2024.100185.' mla: Borgert, Thomas, et al. “Investigations to Improve the Tool Life during Thermomechanical and Incremental Forming of Steel Auxiliary Joining Elements.” Journal of Advanced Joining Processes, vol. 9, 100185, Elsevier BV, 2024, doi:10.1016/j.jajp.2024.100185. short: T. Borgert, A.B. Nordieker, E. Wiens, W. Homberg, Journal of Advanced Joining Processes 9 (2024). date_created: 2024-06-07T09:31:59Z date_updated: 2025-09-22T05:44:28Z department: - _id: '156' doi: 10.1016/j.jajp.2024.100185 intvolume: ' 9' language: - iso: eng project: - _id: '133' name: TRR 285 - Project Area C - _id: '147' name: TRR 285 - Subproject C03 publication: Journal of Advanced Joining Processes publication_identifier: issn: - 2666-3309 publication_status: published publisher: Elsevier BV status: public title: Investigations to improve the tool life during thermomechanical and incremental forming of steel auxiliary joining elements type: journal_article user_id: '88725' volume: 9 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: '63346' abstract: - lang: eng text: 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. author: - first_name: Thomas full_name: Borgert, Thomas id: '83141' last_name: Borgert - first_name: D full_name: Köhler, D last_name: Köhler - first_name: Eugen full_name: Wiens, Eugen id: '7888' last_name: Wiens - first_name: R full_name: Kupfer, R last_name: Kupfer - first_name: J full_name: Troschitz, J last_name: Troschitz - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: M full_name: Gude, M last_name: Gude citation: 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. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 2024;238(12):2299-2306. doi:10.1177/14644207241232233' apa: 'Borgert, T., Köhler, D., Wiens, E., Kupfer, R., Troschitz, J., Homberg, W., & Gude, M. (2024). In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 238(12), 2299–2306. https://doi.org/10.1177/14644207241232233' 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={10.1177/14644207241232233}, 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} }' 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.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 238, no. 12 (2024): 2299–2306. https://doi.org/10.1177/14644207241232233.' ieee: 'T. Borgert et al., “In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element,” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, pp. 2299–2306, 2024, doi: 10.1177/14644207241232233.' mla: 'Borgert, Thomas, et al. “In-Situ Computed Tomography Analysis of the Failure Mechanisms of Thermomechanically Manufactured Joints with Auxiliary Joining Element.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, vol. 238, no. 12, SAGE Publications, 2024, pp. 2299–306, doi:10.1177/14644207241232233.' 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.' date_created: 2025-12-19T09:13:30Z date_updated: 2025-12-22T10:40:28Z department: - _id: '156' doi: 10.1177/14644207241232233 intvolume: ' 238' issue: '12' language: - iso: eng page: 2299-2306 publication: 'Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications' publication_identifier: issn: - 1464-4207 - 2041-3076 publication_status: published publisher: SAGE Publications quality_controlled: '1' status: public title: In-situ computed tomography analysis of the failure mechanisms of thermomechanically manufactured joints with auxiliary joining element type: journal_article user_id: '7888' volume: 238 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: '48001' author: - first_name: Lukas full_name: Bathelt, Lukas last_name: Bathelt - first_name: Eugen full_name: Djakow, Eugen id: '7904' last_name: Djakow - first_name: Frederik full_name: Dahms, Frederik id: '64977' last_name: Dahms - first_name: Christian full_name: Henke, Christian last_name: Henke - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg citation: ama: 'Bathelt L, Djakow E, Dahms F, Henke C, Trächtler A, Homberg W. Neuartiger Ansatz zum Richten von zwei- und dreidimensionalen Fehlern an einem Federdraht. In: Ilmenauer Federntag 2023: Neueste Erkenntnisse Zu Funktion, Berechnung, Prüfung Und Gestaltung von Federn Und Werkstoffen. ISLE Steuerungstechnik und Leistungselektronik; 2023.' apa: 'Bathelt, L., Djakow, E., Dahms, F., Henke, C., Trächtler, A., & Homberg, W. (2023). Neuartiger Ansatz zum Richten von zwei- und dreidimensionalen Fehlern an einem Federdraht. Ilmenauer Federntag 2023: Neueste Erkenntnisse Zu Funktion, Berechnung, Prüfung Und Gestaltung von Federn Und Werkstoffen. Ilmenauer Federntag 2023, Ilmenau.' bibtex: '@inproceedings{Bathelt_Djakow_Dahms_Henke_Trächtler_Homberg_2023, place={Ilmenau, Germany}, title={Neuartiger Ansatz zum Richten von zwei- und dreidimensionalen Fehlern an einem Federdraht}, booktitle={Ilmenauer Federntag 2023: Neueste Erkenntnisse zu Funktion, Berechnung, Prüfung und Gestaltung von Federn und Werkstoffen}, publisher={ISLE Steuerungstechnik und Leistungselektronik}, author={Bathelt, Lukas and Djakow, Eugen and Dahms, Frederik and Henke, Christian and Trächtler, Ansgar and Homberg, Werner}, year={2023} }' chicago: 'Bathelt, Lukas, Eugen Djakow, Frederik Dahms, Christian Henke, Ansgar Trächtler, and Werner Homberg. “Neuartiger Ansatz Zum Richten von Zwei- Und Dreidimensionalen Fehlern an Einem Federdraht.” In Ilmenauer Federntag 2023: Neueste Erkenntnisse Zu Funktion, Berechnung, Prüfung Und Gestaltung von Federn Und Werkstoffen. Ilmenau, Germany: ISLE Steuerungstechnik und Leistungselektronik, 2023.' ieee: L. Bathelt, E. Djakow, F. Dahms, C. Henke, A. Trächtler, and W. Homberg, “Neuartiger Ansatz zum Richten von zwei- und dreidimensionalen Fehlern an einem Federdraht,” presented at the Ilmenauer Federntag 2023, Ilmenau, 2023. mla: 'Bathelt, Lukas, et al. “Neuartiger Ansatz Zum Richten von Zwei- Und Dreidimensionalen Fehlern an Einem Federdraht.” Ilmenauer Federntag 2023: Neueste Erkenntnisse Zu Funktion, Berechnung, Prüfung Und Gestaltung von Federn Und Werkstoffen, ISLE Steuerungstechnik und Leistungselektronik, 2023.' short: 'L. Bathelt, E. Djakow, F. Dahms, C. Henke, A. Trächtler, W. Homberg, in: Ilmenauer Federntag 2023: Neueste Erkenntnisse Zu Funktion, Berechnung, Prüfung Und Gestaltung von Federn Und Werkstoffen, ISLE Steuerungstechnik und Leistungselektronik, Ilmenau, Germany, 2023.' conference: end_date: 2023-09-19 location: Ilmenau name: Ilmenauer Federntag 2023 start_date: 2023-09-18 date_created: 2023-10-11T11:45:56Z date_updated: 2023-10-31T14:56:44Z department: - _id: '156' - _id: '153' - _id: '241' language: - iso: eng place: Ilmenau, Germany publication: 'Ilmenauer Federntag 2023: Neueste Erkenntnisse zu Funktion, Berechnung, Prüfung und Gestaltung von Federn und Werkstoffen' publication_identifier: isbn: - 978-3-948595-09-8 publisher: ISLE Steuerungstechnik und Leistungselektronik quality_controlled: '1' status: public title: Neuartiger Ansatz zum Richten von zwei- und dreidimensionalen Fehlern an einem Federdraht 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: '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: '43031' abstract: - lang: eng text: Abstract. Requirements of multi-material construction involve adjustments to standard joining techniques. Especially the growing importance of integral cast components poses additional engineering challenges for the industry. One approach to achieve these goals are adaptable joining elements formed by friction spinning. This approach uses friction-induced heat to form customisable joining elements to join sheets for different boundary conditions, even for brittle cast materials. It is possible to react immediately to adapt to the joining process inline and reduce the amount of different joining elements. As the joining partner serve casting plates of the aluminium casting alloy EN AC–AlSi9, which is processed in the sand casting. Joining hypoeutectic AlSi alloys constitutes a challenge because the brittle character of these cause cracks in the joint during conventional mechanical joining. Furthermore, the friction-induced heat of the novel joining process causes a finer microstructure in the hypoeutectic AlSi9 casting alloy. In particular, the eutectic Si is more fine-grained, resulting in higher joint ductility. This study indicates the joining suitability of a hypoeutectic aluminium casting alloy in combination with adaptive manufactured additional joining elements. Here, various mechanical and microstructural investigations validate the influence of the thermomechanical joining technique. In conclusion, the potential of this joining process is presented regarding the joinability of cast aluminium components. author: - first_name: Thomas full_name: Borgert, Thomas id: '83141' last_name: Borgert - first_name: Moritz full_name: Neuser, Moritz id: '32340' last_name: Neuser - first_name: Eugen full_name: Wiens, Eugen id: '7888' last_name: Wiens - first_name: Olexandr full_name: Grydin, Olexandr id: '43822' last_name: Grydin - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Mirko full_name: Schaper, Mirko id: '43720' last_name: Schaper citation: ama: 'Borgert T, Neuser M, Wiens E, Grydin O, Homberg W, Schaper M. Influence of thermo-mechanical joining process on the microstructure of a hypoeutectic aluminium cast alloy. In: Materials Research Proceedings. Vol 25. Materials Research Forum LLC; 2023:187-194. doi:10.21741/9781644902417-24' apa: Borgert, T., Neuser, M., Wiens, E., Grydin, O., Homberg, W., & Schaper, M. (2023). Influence of thermo-mechanical joining process on the microstructure of a hypoeutectic aluminium cast alloy. Materials Research Proceedings, 25, 187–194. https://doi.org/10.21741/9781644902417-24 bibtex: '@inproceedings{Borgert_Neuser_Wiens_Grydin_Homberg_Schaper_2023, title={Influence of thermo-mechanical joining process on the microstructure of a hypoeutectic aluminium cast alloy}, volume={25}, DOI={10.21741/9781644902417-24}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Borgert, Thomas and Neuser, Moritz and Wiens, Eugen and Grydin, Olexandr and Homberg, Werner and Schaper, Mirko}, year={2023}, pages={187–194} }' chicago: Borgert, Thomas, Moritz Neuser, Eugen Wiens, Olexandr Grydin, Werner Homberg, and Mirko Schaper. “Influence of Thermo-Mechanical Joining Process on the Microstructure of a Hypoeutectic Aluminium Cast Alloy.” In Materials Research Proceedings, 25:187–94. Materials Research Forum LLC, 2023. https://doi.org/10.21741/9781644902417-24. ieee: 'T. Borgert, M. Neuser, E. Wiens, O. Grydin, W. Homberg, and M. Schaper, “Influence of thermo-mechanical joining process on the microstructure of a hypoeutectic aluminium cast alloy,” in Materials Research Proceedings, Nürnberg, 2023, vol. 25, pp. 187–194, doi: 10.21741/9781644902417-24.' mla: Borgert, Thomas, et al. “Influence of Thermo-Mechanical Joining Process on the Microstructure of a Hypoeutectic Aluminium Cast Alloy.” Materials Research Proceedings, vol. 25, Materials Research Forum LLC, 2023, pp. 187–94, doi:10.21741/9781644902417-24. short: 'T. Borgert, M. Neuser, E. Wiens, O. Grydin, W. Homberg, M. Schaper, in: Materials Research Proceedings, Materials Research Forum LLC, 2023, pp. 187–194.' conference: end_date: 05.04.2023 location: Nürnberg name: 20th International Conference on Sheet Metal start_date: 02.04.2023 date_created: 2023-03-16T14:59:01Z date_updated: 2024-03-14T15:22:17Z department: - _id: '156' - _id: '158' doi: 10.21741/9781644902417-24 intvolume: ' 25' language: - iso: eng page: 187-194 project: - _id: '147' name: 'TRR 285 – C03: TRR 285 - Subproject C03' - _id: '136' name: 'TRR 285 – A02: TRR 285 - Subproject A02' publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: Influence of thermo-mechanical joining process on the microstructure of a hypoeutectic aluminium cast alloy type: conference user_id: '32340' volume: 25 year: '2023' ... --- _id: '47535' abstract: - lang: eng text: Consistent lightweight construction in the area of vehicle manufacturing requires the increased use of multi-material combinations. This, in turn, requires an adaptation of standard joining techniques. In multi-material combinations, the importance of integral cast components, in particular, is increasing and poses additional technical challenges for the industry. One approach to solve these challenges is adaptable joining elements manufactured by a thermomechanical forming process. By applying an incremental and thermomechanical joining process, it is possible to react immediately and adapt the joining process inline to reduce the number of different joining elements. In the investigation described in this publication, cast plates made of the cast aluminium alloy EN AC-AlSi9 serve as joining partners, which are processed by sand casting. The joining process of hypoeutectic AlSi alloys is challenging as their brittle character leads to cracks in the joint during conventional mechanical joining. To solve this, the frictional heat of the novel joining process applied can provide a finer microstructure in the hypoeutectic AlSi9 cast alloy. In detail, its Si is finer-grained, resulting in higher ductility of the joint. This study reveals the thermomechanical joining suitability of a hypoeutectic cast aluminium alloy in combination with adaptively manufactured auxiliary joining elements. article_number: '169' article_type: original author: - first_name: Thomas full_name: Borgert, Thomas id: '83141' last_name: Borgert - first_name: Moritz full_name: Neuser, Moritz id: '32340' last_name: Neuser - first_name: Kay-Peter full_name: Hoyer, Kay-Peter id: '48411' last_name: Hoyer - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Mirko full_name: Schaper, Mirko id: '43720' last_name: Schaper citation: ama: Borgert T, Neuser M, Hoyer K-P, Homberg W, Schaper M. Thermomechanical Joining of Hypoeutectic Aluminium Cast Plates. Journal of Manufacturing and Materials Processing. 2023;7(5). doi:10.3390/jmmp7050169 apa: Borgert, T., Neuser, M., Hoyer, K.-P., Homberg, W., & Schaper, M. (2023). Thermomechanical Joining of Hypoeutectic Aluminium Cast Plates. Journal of Manufacturing and Materials Processing, 7(5), Article 169. https://doi.org/10.3390/jmmp7050169 bibtex: '@article{Borgert_Neuser_Hoyer_Homberg_Schaper_2023, title={Thermomechanical Joining of Hypoeutectic Aluminium Cast Plates}, volume={7}, DOI={10.3390/jmmp7050169}, number={5169}, journal={Journal of Manufacturing and Materials Processing}, publisher={MDPI AG}, author={Borgert, Thomas and Neuser, Moritz and Hoyer, Kay-Peter and Homberg, Werner and Schaper, Mirko}, year={2023} }' chicago: Borgert, Thomas, Moritz Neuser, Kay-Peter Hoyer, Werner Homberg, and Mirko Schaper. “Thermomechanical Joining of Hypoeutectic Aluminium Cast Plates.” Journal of Manufacturing and Materials Processing 7, no. 5 (2023). https://doi.org/10.3390/jmmp7050169. ieee: 'T. Borgert, M. Neuser, K.-P. Hoyer, W. Homberg, and M. Schaper, “Thermomechanical Joining of Hypoeutectic Aluminium Cast Plates,” Journal of Manufacturing and Materials Processing, vol. 7, no. 5, Art. no. 169, 2023, doi: 10.3390/jmmp7050169.' mla: Borgert, Thomas, et al. “Thermomechanical Joining of Hypoeutectic Aluminium Cast Plates.” Journal of Manufacturing and Materials Processing, vol. 7, no. 5, 169, MDPI AG, 2023, doi:10.3390/jmmp7050169. short: T. Borgert, M. Neuser, K.-P. Hoyer, W. Homberg, M. Schaper, Journal of Manufacturing and Materials Processing 7 (2023). date_created: 2023-10-02T06:46:53Z date_updated: 2024-03-14T15:22:06Z department: - _id: '156' - _id: '158' doi: 10.3390/jmmp7050169 intvolume: ' 7' issue: '5' keyword: - Industrial and Manufacturing Engineering - Mechanical Engineering - Mechanics of Materials language: - iso: eng project: - _id: '147' name: 'TRR 285 – C03: TRR 285 - Subproject C03' - _id: '136' name: 'TRR 285 – A02: TRR 285 - Subproject A02' publication: Journal of Manufacturing and Materials Processing publication_identifier: issn: - 2504-4494 publication_status: published publisher: MDPI AG quality_controlled: '1' status: public title: Thermomechanical Joining of Hypoeutectic Aluminium Cast Plates type: journal_article user_id: '32340' volume: 7 year: '2023' ... --- _id: '44036' abstract: - lang: eng text: Abstract. In order to reduce global energy consumption in production and industry along with the associated CO2 emissions, existing resources must be used more efficiently. This includes the energy-efficient and comprehensive recycling of a wide range of metals. Especially for the production of aluminium, there is a large potential for saving energy using efficient recycling processes. With regard to the recycling of aluminium studies have shown that solid-state recycling processes are significantly more efficient considering the used energy and resources compared to the conventional, smelting-metallurgical recycling process. In this paper, the direct and energy-efficient friction-induced recycling process (FIRP) based on the conform process is further described and analysed in terms of the temperature-property relationships. For this purpose, the influence of the processing temperature on the microstructure and properties of the recycled semi-finished products is investigated using the toll system that enables an ECAP forming. Specific sections of the (in theory) infinite, recycled semi-finished product are taken and analysed at different process temperatures of the solid state recycling process. Based on these sections, the properties in terms of mechanical hardness, strength, ductility and grain size are analysed and a degressive relationship between process temperature and mechanical hardness up to a temperature of 270 °C can be shown. Applying the Hall-Petch relationship, it is analysed whether there is a correlation between the strength and the microstructure in the form of the grain size. author: - first_name: Thomas full_name: Borgert, Thomas id: '83141' last_name: Borgert - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg citation: ama: 'Borgert T, Homberg W. Analysis of temperature effect on strength and microstructure in friction induced recycling process (FIRP). In: Materials Research Proceedings. Materials Research Forum LLC; 2023. doi:10.21741/9781644902479-211' apa: Borgert, T., & Homberg, W. (2023). Analysis of temperature effect on strength and microstructure in friction induced recycling process (FIRP). Materials Research Proceedings. ESAFORM 2023, Kraków. https://doi.org/10.21741/9781644902479-211 bibtex: '@inproceedings{Borgert_Homberg_2023, title={Analysis of temperature effect on strength and microstructure in friction induced recycling process (FIRP)}, DOI={10.21741/9781644902479-211}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Borgert, Thomas and Homberg, Werner}, year={2023} }' chicago: Borgert, Thomas, and Werner Homberg. “Analysis of Temperature Effect on Strength and Microstructure in Friction Induced Recycling Process (FIRP).” In Materials Research Proceedings. Materials Research Forum LLC, 2023. https://doi.org/10.21741/9781644902479-211. ieee: 'T. Borgert and W. Homberg, “Analysis of temperature effect on strength and microstructure in friction induced recycling process (FIRP),” presented at the ESAFORM 2023, Kraków, 2023, doi: 10.21741/9781644902479-211.' mla: Borgert, Thomas, and Werner Homberg. “Analysis of Temperature Effect on Strength and Microstructure in Friction Induced Recycling Process (FIRP).” Materials Research Proceedings, Materials Research Forum LLC, 2023, doi:10.21741/9781644902479-211. short: 'T. Borgert, W. Homberg, in: Materials Research Proceedings, Materials Research Forum LLC, 2023.' conference: location: Kraków name: ESAFORM 2023 date_created: 2023-04-17T08:00:28Z date_updated: 2023-04-26T13:26:22Z department: - _id: '156' doi: 10.21741/9781644902479-211 keyword: - Recycling - Aluminium - Friction-Induced - Energy Efficiency 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: Analysis of temperature effect on strength and microstructure in friction induced recycling process (FIRP) type: conference user_id: '83141' year: '2023' ... --- _id: '44035' abstract: - lang: eng text: Abstract. Friction-spinning as an innovative incremental forming process enables large degrees of deformation in tube and sheet metal-forming due to a self-induced heat generation in the forming zone. This paper presents new process designs for energy and resource-efficient forming of gas cylinders by friction-spinning without the use of an external heat supply. The self-generated heat enables friction-spinning process to reduce the energy demand in the manufacture of gas cylinders, which are usually manufactured with external heat (mostly fossil fuels), by 95 %. Typical gas cylinder contours, such as flattened and spherical bottom ends and cylinder necks, are manufactured by friction-spinning of AW 6060 tubular profiles with specifically designed tool path strategies. It is shown that friction-spinning enables the manufacture of typical gas cylinder contours with sufficient wall thickness and the required gas tightness without the input of external heat. Thus, this process can contribute to an increase in the energy and resource efficiency of forming processes. author: - first_name: Frederik full_name: Dahms, Frederik id: '64977' last_name: Dahms - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg citation: ama: 'Dahms F, Homberg W. Energy and Resource-efficient Forming of Gas Cylinders by Friction-Spinning. In: Materials Research Proceedings. Materials Research Forum LLC; 2023. doi:10.21741/9781644902479-208' apa: Dahms, F., & Homberg, W. (2023). Energy and Resource-efficient Forming of Gas Cylinders by Friction-Spinning. Materials Research Proceedings. ESAFORM 2023, Krakau. https://doi.org/10.21741/9781644902479-208 bibtex: '@inproceedings{Dahms_Homberg_2023, title={Energy and Resource-efficient Forming of Gas Cylinders by Friction-Spinning}, DOI={10.21741/9781644902479-208}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Dahms, Frederik and Homberg, Werner}, year={2023} }' chicago: Dahms, Frederik, and Werner Homberg. “Energy and Resource-Efficient Forming of Gas Cylinders by Friction-Spinning.” In Materials Research Proceedings. Materials Research Forum LLC, 2023. https://doi.org/10.21741/9781644902479-208. ieee: 'F. Dahms and W. Homberg, “Energy and Resource-efficient Forming of Gas Cylinders by Friction-Spinning,” presented at the ESAFORM 2023, Krakau, 2023, doi: 10.21741/9781644902479-208.' mla: Dahms, Frederik, and Werner Homberg. “Energy and Resource-Efficient Forming of Gas Cylinders by Friction-Spinning.” Materials Research Proceedings, Materials Research Forum LLC, 2023, doi:10.21741/9781644902479-208. short: 'F. Dahms, W. Homberg, in: Materials Research Proceedings, Materials Research Forum LLC, 2023.' conference: end_date: 2023-04-21 location: Krakau name: ESAFORM 2023 start_date: 2023-04-19 date_created: 2023-04-17T07:40:54Z date_updated: 2023-04-27T10:30:44Z department: - _id: '156' doi: 10.21741/9781644902479-208 language: - iso: eng publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' related_material: link: - relation: confirmation url: https://www.mrforum.com/product/9781644902479-208/ status: public title: Energy and Resource-efficient Forming of Gas Cylinders by Friction-Spinning type: conference user_id: '64977' year: '2023' ... --- _id: '43044' abstract: - lang: eng text: Abstract. The combination of incremental sheet metal forming and high-speed forming offers new possibilities for flexible forming processes in the production of large sheet metal components of increased complexity with relatively low forming energies. In this paper, the general feasibility and process differences between the pulse-driven high-speed forming technologies of electrohydraulic and electromagnetic forming were investigated. An example component made of EN AW 6016 aluminum sheet metal was thus formed incrementally by both processes and the forming result evaluated by an optical 3D measurement system. For this purpose, a forming strategy for electromagnetic incremental forming (EMIF) was developed, tested and adapted to the electrohydraulic incremental forming process (EHIF). The discharge energy, the tool displacement and the pressure field of the forming zone were determined as relevant parameters for the definition of an adequate tool path strategy. It was found that the EHIF process is less affected by larger distances between the tool and the blank, while this is a critical variable for force application to the component during EMIF. On the other hand, the more uniform pressure distribution of the EMIF process is advantageous for forming large steady component areas. author: - first_name: Maik full_name: Holzmüller, Maik id: '82645' last_name: Holzmüller - first_name: Maik full_name: Linnemann, Maik last_name: Linnemann - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg - first_name: Verena full_name: Psyk, Verena last_name: Psyk - first_name: 'Verena ' full_name: 'Kräusel, Verena ' last_name: Kräusel - first_name: Janika full_name: Kroos, Janika last_name: Kroos citation: ama: 'Holzmüller M, Linnemann M, Homberg W, Psyk V, Kräusel V, Kroos J. Proof of concept for incremental sheet metal forming by means of electromagnetic and electrohydraulic high-speed forming. In: Materials Research Proceedings. Vol 25. Materials Research Forum LLC; 2023:11-18. doi:10.21741/9781644902417-2' apa: Holzmüller, M., Linnemann, M., Homberg, W., Psyk, V., Kräusel, V., & Kroos, J. (2023). Proof of concept for incremental sheet metal forming by means of electromagnetic and electrohydraulic high-speed forming. Materials Research Proceedings, 25, 11–18. https://doi.org/10.21741/9781644902417-2 bibtex: '@inproceedings{Holzmüller_Linnemann_Homberg_Psyk_Kräusel_Kroos_2023, title={Proof of concept for incremental sheet metal forming by means of electromagnetic and electrohydraulic high-speed forming}, volume={25}, DOI={10.21741/9781644902417-2}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Holzmüller, Maik and Linnemann, Maik and Homberg, Werner and Psyk, Verena and Kräusel, Verena and Kroos, Janika}, year={2023}, pages={11–18} }' chicago: Holzmüller, Maik, Maik Linnemann, Werner Homberg, Verena Psyk, Verena Kräusel, and Janika Kroos. “Proof of Concept for Incremental Sheet Metal Forming by Means of Electromagnetic and Electrohydraulic High-Speed Forming.” In Materials Research Proceedings, 25:11–18. Materials Research Forum LLC, 2023. https://doi.org/10.21741/9781644902417-2. ieee: 'M. Holzmüller, M. Linnemann, W. Homberg, V. Psyk, V. Kräusel, and J. Kroos, “Proof of concept for incremental sheet metal forming by means of electromagnetic and electrohydraulic high-speed forming,” in Materials Research Proceedings, Nürnberg, 2023, vol. 25, pp. 11–18, doi: 10.21741/9781644902417-2.' mla: Holzmüller, Maik, et al. “Proof of Concept for Incremental Sheet Metal Forming by Means of Electromagnetic and Electrohydraulic High-Speed Forming.” Materials Research Proceedings, vol. 25, Materials Research Forum LLC, 2023, pp. 11–18, doi:10.21741/9781644902417-2. short: 'M. Holzmüller, M. Linnemann, W. Homberg, V. Psyk, V. Kräusel, J. Kroos, in: Materials Research Proceedings, Materials Research Forum LLC, 2023, pp. 11–18.' conference: end_date: 2023-04-05 location: Nürnberg name: 20th International Conference on Sheet Metal 2023 start_date: 2023-04-02 date_created: 2023-03-17T10:23:18Z date_updated: 2023-05-02T11:40:24Z department: - _id: '156' doi: 10.21741/9781644902417-2 intvolume: ' 25' keyword: - Incremental Sheet Forming - Aluminium - High-Speed Forming language: - iso: eng page: 11-18 publication: Materials Research Proceedings publication_identifier: issn: - 2474-395X publication_status: published publisher: Materials Research Forum LLC quality_controlled: '1' status: public title: Proof of concept for incremental sheet metal forming by means of electromagnetic and electrohydraulic high-speed forming type: conference user_id: '82645' volume: 25 year: '2023' ... --- _id: '43045' abstract: - lang: eng text: The pressure fields generated by two simultaneous discharges have not been investigated on any notable scale for the electrohydraulic impulse forming method. In this study, the synchronicity of two discharges is ensured by the sequential connection of two wires mounted in two spark gaps in a common volume of liquid. The objective is to experimentally confirm the equilibrium of the energies evolved in two spark gaps by means of pressure measurements. In addition, multipoint membrane pressure gauges demonstrated the feasibility of easily recording detailed pressure maps. Based on the membrane deformation mechanism and material strengthening under static and impulse conditions, the processing procedure is further developed so as to achieve better accuracy in the determination of pressure field parameters. The practical equality of the pressure fields on the left and right halves of the flat-loaded area confirms the equality of energies evolved in the two spark gaps. The direct shock waves create zones with the most intensive loading. These results provide a basis for the development of new electrohydraulic technologies involving the application of two simultaneous discharges with equal energy and pressure parameters. article_number: '40' author: - first_name: Mykhaylo full_name: Knyazyev, Mykhaylo last_name: Knyazyev - first_name: Maik full_name: Holzmüller, Maik id: '82645' last_name: Holzmüller - first_name: Werner full_name: Homberg, Werner id: '233' last_name: Homberg citation: ama: Knyazyev M, Holzmüller M, Homberg W. Investigation of Pressure Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires. Journal of Manufacturing and Materials Processing. 2023;7(1). doi:10.3390/jmmp7010040 apa: Knyazyev, M., Holzmüller, M., & Homberg, W. (2023). Investigation of Pressure Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires. Journal of Manufacturing and Materials Processing, 7(1), Article 40. https://doi.org/10.3390/jmmp7010040 bibtex: '@article{Knyazyev_Holzmüller_Homberg_2023, title={Investigation of Pressure Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires}, volume={7}, DOI={10.3390/jmmp7010040}, number={140}, journal={Journal of Manufacturing and Materials Processing}, publisher={MDPI AG}, author={Knyazyev, Mykhaylo and Holzmüller, Maik and Homberg, Werner}, year={2023} }' chicago: Knyazyev, Mykhaylo, Maik Holzmüller, and Werner Homberg. “Investigation of Pressure Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires.” Journal of Manufacturing and Materials Processing 7, no. 1 (2023). https://doi.org/10.3390/jmmp7010040. ieee: 'M. Knyazyev, M. Holzmüller, and W. Homberg, “Investigation of Pressure Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires,” Journal of Manufacturing and Materials Processing, vol. 7, no. 1, Art. no. 40, 2023, doi: 10.3390/jmmp7010040.' mla: Knyazyev, Mykhaylo, et al. “Investigation of Pressure Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires.” Journal of Manufacturing and Materials Processing, vol. 7, no. 1, 40, MDPI AG, 2023, doi:10.3390/jmmp7010040. short: M. Knyazyev, M. Holzmüller, W. Homberg, Journal of Manufacturing and Materials Processing 7 (2023). date_created: 2023-03-17T10:31:23Z date_updated: 2023-05-02T11:40:35Z department: - _id: '156' doi: 10.3390/jmmp7010040 intvolume: ' 7' issue: '1' keyword: - impulse - forming - electrohydraulic - discharge - wire - pressure gauge - pressure field language: - iso: eng publication: Journal of Manufacturing and Materials Processing publication_identifier: issn: - 2504-4494 publication_status: published publisher: MDPI AG quality_controlled: '1' status: public title: Investigation of Pressure Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires type: journal_article user_id: '82645' volume: 7 year: '2023' ...