[{"status":"public","type":"journal_article","article_number":"1001","file_date_updated":"2024-11-28T08:52:48Z","_id":"57467","department":[{"_id":"149"},{"_id":"321"},{"_id":"9"}],"user_id":"93904","intvolume":"        14","citation":{"bibtex":"@article{Lehnert_Bödger_Pabel_Scheidemann_Hemsel_Gnaase_Kostka_Tröster_2024, title={The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced Component}, volume={14}, DOI={<a href=\"https://doi.org/10.3390/cryst14111001\">10.3390/cryst14111001</a>}, number={111001}, journal={Crystals}, publisher={MDPI AG}, author={Lehnert, Dennis and Bödger, Christian and Pabel, Philipp and Scheidemann, Claus and Hemsel, Tobias and Gnaase, Stefan and Kostka, David and Tröster, Thomas}, year={2024} }","short":"D. Lehnert, C. Bödger, P. Pabel, C. Scheidemann, T. Hemsel, S. Gnaase, D. Kostka, T. Tröster, Crystals 14 (2024).","mla":"Lehnert, Dennis, et al. “The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced Component.” <i>Crystals</i>, vol. 14, no. 11, 1001, MDPI AG, 2024, doi:<a href=\"https://doi.org/10.3390/cryst14111001\">10.3390/cryst14111001</a>.","apa":"Lehnert, D., Bödger, C., Pabel, P., Scheidemann, C., Hemsel, T., Gnaase, S., Kostka, D., &#38; Tröster, T. (2024). The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced Component. <i>Crystals</i>, <i>14</i>(11), Article 1001. <a href=\"https://doi.org/10.3390/cryst14111001\">https://doi.org/10.3390/cryst14111001</a>","chicago":"Lehnert, Dennis, Christian Bödger, Philipp Pabel, Claus Scheidemann, Tobias Hemsel, Stefan Gnaase, David Kostka, and Thomas Tröster. “The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced Component.” <i>Crystals</i> 14, no. 11 (2024). <a href=\"https://doi.org/10.3390/cryst14111001\">https://doi.org/10.3390/cryst14111001</a>.","ieee":"D. Lehnert <i>et al.</i>, “The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced Component,” <i>Crystals</i>, vol. 14, no. 11, Art. no. 1001, 2024, doi: <a href=\"https://doi.org/10.3390/cryst14111001\">10.3390/cryst14111001</a>.","ama":"Lehnert D, Bödger C, Pabel P, et al. The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced Component. <i>Crystals</i>. 2024;14(11). doi:<a href=\"https://doi.org/10.3390/cryst14111001\">10.3390/cryst14111001</a>"},"has_accepted_license":"1","publication_identifier":{"issn":["2073-4352"]},"publication_status":"published","doi":"10.3390/cryst14111001","date_updated":"2026-02-23T08:07:37Z","volume":14,"author":[{"first_name":"Dennis","id":"90491","full_name":"Lehnert, Dennis","last_name":"Lehnert"},{"full_name":"Bödger, Christian","id":"93904","last_name":"Bödger","first_name":"Christian"},{"first_name":"Philipp","last_name":"Pabel","full_name":"Pabel, Philipp","id":"67374"},{"first_name":"Claus","last_name":"Scheidemann","id":"38259","full_name":"Scheidemann, Claus"},{"first_name":"Tobias","id":"210","full_name":"Hemsel, Tobias","last_name":"Hemsel"},{"first_name":"Stefan","last_name":"Gnaase","id":"25730","full_name":"Gnaase, Stefan"},{"last_name":"Kostka","full_name":"Kostka, David","first_name":"David"},{"last_name":"Tröster","full_name":"Tröster, Thomas","id":"553","first_name":"Thomas"}],"abstract":[{"lang":"eng","text":"<jats:p>Additive manufacturing of metallic components often results in the formation of columnar grain structures aligned along the build direction. These elongated grains can introduce anisotropy, negatively impacting the mechanical properties of the components. This study aimed to achieve controlled solidification with a fine-grained microstructure to enhance the mechanical performance of printed parts. Stainless steel 316L was used as the test material. High-intensity ultrasound was applied during the direct energy deposition (DED) process to inhibit the formation of columnar grains. The investigation emphasized the importance of amplitude changes of the ultrasound wave as the system’s geometry continuously evolves with the addition of multiple layers and assessed how these changes influence the grain size and distribution. Initial tests revealed significant amplitude fluctuations during layer deposition, highlighting the impact of layer deposition on process uniformity. The mechanical results demonstrated that the application of ultrasound effectively refined the grain structure, leading to a 15% increase in tensile strength compared to conventionally additively manufactured samples.</jats:p>"}],"file":[{"access_level":"closed","file_name":"crystals-14-01001-v2 (4).pdf","file_id":"57470","file_size":5779744,"creator":"dlehnert","date_created":"2024-11-28T08:52:48Z","date_updated":"2024-11-28T08:52:48Z","relation":"main_file","success":1,"content_type":"application/pdf"}],"publication":"Crystals","ddc":["670"],"language":[{"iso":"eng"}],"year":"2024","quality_controlled":"1","issue":"11","title":"The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced Component","publisher":"MDPI AG","date_created":"2024-11-28T08:45:06Z"},{"type":"conference","publication":"DECHEMA-Workshop für Klebstoffanwender: Simulation von Klebverbindungen","status":"public","_id":"52211","user_id":"537","department":[{"_id":"157"}],"language":[{"iso":"eng"}],"quality_controlled":"1","year":"2024","citation":{"short":"F. Beule, D. Teutenberg, G. Meschut, in: DECHEMA (Ed.), DECHEMA-Workshop Für Klebstoffanwender: Simulation von Klebverbindungen, 2024.","bibtex":"@inproceedings{Beule_Teutenberg_Meschut_2024, title={Klebstoffmodell - Parameteridentifikation, Verifikation und Validierung für den Lastfall Crash}, booktitle={DECHEMA-Workshop für Klebstoffanwender: Simulation von Klebverbindungen}, author={Beule, Felix and Teutenberg, Dominik and Meschut, Gerson}, editor={DECHEMA}, year={2024} }","mla":"Beule, Felix, et al. “Klebstoffmodell - Parameteridentifikation, Verifikation Und Validierung Für Den Lastfall Crash.” <i>DECHEMA-Workshop Für Klebstoffanwender: Simulation von Klebverbindungen</i>, edited by DECHEMA, 2024.","apa":"Beule, F., Teutenberg, D., &#38; Meschut, G. (2024). Klebstoffmodell - Parameteridentifikation, Verifikation und Validierung für den Lastfall Crash. In DECHEMA (Ed.), <i>DECHEMA-Workshop für Klebstoffanwender: Simulation von Klebverbindungen</i>.","ama":"Beule F, Teutenberg D, Meschut G. Klebstoffmodell - Parameteridentifikation, Verifikation und Validierung für den Lastfall Crash. In: DECHEMA, ed. <i>DECHEMA-Workshop Für Klebstoffanwender: Simulation von Klebverbindungen</i>. ; 2024.","chicago":"Beule, Felix, Dominik Teutenberg, and Gerson Meschut. “Klebstoffmodell - Parameteridentifikation, Verifikation Und Validierung Für Den Lastfall Crash.” In <i>DECHEMA-Workshop Für Klebstoffanwender: Simulation von Klebverbindungen</i>, edited by DECHEMA, 2024.","ieee":"F. Beule, D. Teutenberg, and G. Meschut, “Klebstoffmodell - Parameteridentifikation, Verifikation und Validierung für den Lastfall Crash,” in <i>DECHEMA-Workshop für Klebstoffanwender: Simulation von Klebverbindungen</i>, Köln, 2024."},"corporate_editor":["DECHEMA"],"date_updated":"2026-02-23T08:26:01Z","date_created":"2024-02-29T12:19:57Z","author":[{"first_name":"Felix","id":"66192","full_name":"Beule, Felix","last_name":"Beule"},{"last_name":"Teutenberg","full_name":"Teutenberg, Dominik","id":"537","first_name":"Dominik"},{"orcid":"0000-0002-2763-1246","last_name":"Meschut","full_name":"Meschut, Gerson","id":"32056","first_name":"Gerson"}],"title":"Klebstoffmodell - Parameteridentifikation, Verifikation und Validierung für den Lastfall Crash","conference":{"end_date":"2024-02-26","location":"Köln","name":"DECHEMA-Workshop für Klebstoffanwender: Simulation von Klebverbindungen","start_date":"2024-02-26"}},{"type":"conference","status":"public","_id":"52214","user_id":"537","department":[{"_id":"157"}],"language":[{"iso":"eng"}],"quality_controlled":"1","year":"2024","citation":{"ama":"Beule F, Teutenberg D, Meschut G, et al. Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen unter Crashbelastung. In: DECHEMA, ed. ; 2024.","ieee":"F. Beule <i>et al.</i>, “Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen unter Crashbelastung,” Köln, 2024.","chicago":"Beule, Felix, Dominik Teutenberg, Gerson Meschut, Lars Schmelzle, Gunnar Possart, Julia Mergheim, and Paul Steinmann. “Methodenentwicklung Zur Simulation von Hyperelastischen Klebverbindungen Unter Crashbelastung.” edited by DECHEMA, 2024.","bibtex":"@inproceedings{Beule_Teutenberg_Meschut_Schmelzle_Possart_Mergheim_Steinmann_2024, title={Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen unter Crashbelastung}, author={Beule, Felix and Teutenberg, Dominik and Meschut, Gerson and Schmelzle, Lars and Possart, Gunnar and Mergheim, Julia and Steinmann, Paul}, editor={DECHEMA}, year={2024} }","mla":"Beule, Felix, et al. <i>Methodenentwicklung Zur Simulation von Hyperelastischen Klebverbindungen Unter Crashbelastung</i>. Edited by DECHEMA, 2024.","short":"F. Beule, D. Teutenberg, G. Meschut, L. Schmelzle, G. Possart, J. Mergheim, P. Steinmann, in: DECHEMA (Ed.), 2024.","apa":"Beule, F., Teutenberg, D., Meschut, G., Schmelzle, L., Possart, G., Mergheim, J., &#38; Steinmann, P. (2024). <i>Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen unter Crashbelastung</i> (DECHEMA, Ed.)."},"corporate_editor":["DECHEMA"],"date_updated":"2026-02-23T08:26:30Z","date_created":"2024-02-29T12:24:51Z","author":[{"id":"66192","full_name":"Beule, Felix","last_name":"Beule","first_name":"Felix"},{"first_name":"Dominik","last_name":"Teutenberg","full_name":"Teutenberg, Dominik","id":"537"},{"id":"32056","full_name":"Meschut, Gerson","orcid":"0000-0002-2763-1246","last_name":"Meschut","first_name":"Gerson"},{"first_name":"Lars","last_name":"Schmelzle","full_name":"Schmelzle, Lars"},{"first_name":"Gunnar","full_name":"Possart, Gunnar","last_name":"Possart"},{"first_name":"Julia","full_name":"Mergheim, Julia","last_name":"Mergheim"},{"last_name":"Steinmann","full_name":"Steinmann, Paul","first_name":"Paul"}],"title":"Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen unter Crashbelastung","conference":{"start_date":"2024-02-27","name":"24. Kolloquium: Gemeinsame Forschung in der Klebtechnik","location":"Köln","end_date":"2024-02-28"}},{"year":"2024","citation":{"short":"K. Yang, G. Seitz, V. Schreiber, G. Meschut, M. Biegler, S. Jüttner, M. Rethmeier, Validierung von Methoden zur Vermeidung von Liquid Metal Embrittlement an realitätsnahen Prinzipbauteilen, 2024.","bibtex":"@book{Yang_Seitz_Schreiber_Meschut_Biegler_Jüttner_Rethmeier_2024, title={Validierung von Methoden zur Vermeidung von Liquid Metal Embrittlement an realitätsnahen Prinzipbauteilen}, author={Yang, Keke and Seitz, Georg and Schreiber, Vincent and Meschut, Gerson and Biegler, Max and Jüttner, Sven and Rethmeier, Michael }, year={2024} }","mla":"Yang, Keke, et al. <i>Validierung von Methoden zur Vermeidung von Liquid Metal Embrittlement an realitätsnahen Prinzipbauteilen</i>. 2024.","apa":"Yang, K., Seitz, G., Schreiber, V., Meschut, G., Biegler, M., Jüttner, S., &#38; Rethmeier, M. (2024). <i>Validierung von Methoden zur Vermeidung von Liquid Metal Embrittlement an realitätsnahen Prinzipbauteilen</i>.","ama":"Yang K, Seitz G, Schreiber V, et al. <i>Validierung von Methoden zur Vermeidung von Liquid Metal Embrittlement an realitätsnahen Prinzipbauteilen</i>.; 2024.","chicago":"Yang, Keke, Georg Seitz, Vincent Schreiber, Gerson Meschut, Max Biegler, Sven Jüttner, and Michael  Rethmeier. <i>Validierung von Methoden zur Vermeidung von Liquid Metal Embrittlement an realitätsnahen Prinzipbauteilen</i>, 2024.","ieee":"K. Yang <i>et al.</i>, <i>Validierung von Methoden zur Vermeidung von Liquid Metal Embrittlement an realitätsnahen Prinzipbauteilen</i>. 2024."},"publication_status":"published","publication_identifier":{"isbn":["978-3-96780-190-3"]},"quality_controlled":"1","title":"Validierung von Methoden zur Vermeidung von Liquid Metal Embrittlement an realitätsnahen Prinzipbauteilen","date_updated":"2026-02-23T10:27:07Z","author":[{"first_name":"Keke","orcid":"0000-0001-9201-9304","last_name":"Yang","id":"65085","full_name":"Yang, Keke"},{"full_name":"Seitz, Georg","last_name":"Seitz","first_name":"Georg"},{"full_name":"Schreiber, Vincent","last_name":"Schreiber","first_name":"Vincent"},{"first_name":"Gerson","full_name":"Meschut, Gerson","id":"32056","orcid":"0000-0002-2763-1246","last_name":"Meschut"},{"full_name":"Biegler, Max","last_name":"Biegler","first_name":"Max"},{"first_name":"Sven","full_name":"Jüttner, Sven","last_name":"Jüttner"},{"first_name":"Michael ","last_name":"Rethmeier","full_name":"Rethmeier, Michael "}],"date_created":"2025-02-24T07:28:45Z","status":"public","type":"book","language":[{"iso":"ger"}],"_id":"58800","user_id":"65085","department":[{"_id":"157"}]},{"user_id":"101166","department":[{"_id":"300"}],"_id":"62052","language":[{"iso":"ger"}],"type":"conference_abstract","status":"public","author":[{"first_name":"Eileen","id":"101166","full_name":"Reckmann, Eileen","last_name":"Reckmann"},{"id":"78354","full_name":"Blomberg, Tobias","last_name":"Blomberg","first_name":"Tobias"},{"first_name":"Katrin","id":"30086","full_name":"Temmen, Katrin","last_name":"Temmen"}],"date_created":"2025-11-03T10:28:07Z","date_updated":"2026-02-26T10:08:10Z","conference":{"location":"München","end_date":"2024-10-11","start_date":"2024-10-10","name":"9. JOTED Technikdidaktik-Symposium"},"title":"„Das ist genau das richtige Setting“ ‒ Zusammen lehren und lernen im MINT-Cluster MINT4.OWL","citation":{"ama":"Reckmann E, Blomberg T, Temmen K. „Das ist genau das richtige Setting“ ‒ Zusammen lehren und lernen im MINT-Cluster MINT4.OWL. In: ; 2024.","apa":"Reckmann, E., Blomberg, T., &#38; Temmen, K. (2024). <i>„Das ist genau das richtige Setting“ ‒ Zusammen lehren und lernen im MINT-Cluster MINT4.OWL</i>. 9. JOTED Technikdidaktik-Symposium, München.","short":"E. Reckmann, T. Blomberg, K. Temmen, in: 2024.","mla":"Reckmann, Eileen, et al. <i>„Das ist genau das richtige Setting“ ‒ Zusammen lehren und lernen im MINT-Cluster MINT4.OWL</i>. 2024.","bibtex":"@inproceedings{Reckmann_Blomberg_Temmen_2024, title={„Das ist genau das richtige Setting“ ‒ Zusammen lehren und lernen im MINT-Cluster MINT4.OWL}, author={Reckmann, Eileen and Blomberg, Tobias and Temmen, Katrin}, year={2024} }","ieee":"E. Reckmann, T. Blomberg, and K. Temmen, “„Das ist genau das richtige Setting“ ‒ Zusammen lehren und lernen im MINT-Cluster MINT4.OWL,” presented at the 9. JOTED Technikdidaktik-Symposium, München, 2024.","chicago":"Reckmann, Eileen, Tobias Blomberg, and Katrin Temmen. “„Das ist genau das richtige Setting“ ‒ Zusammen lehren und lernen im MINT-Cluster MINT4.OWL,” 2024."},"year":"2024"},{"language":[{"iso":"eng"}],"keyword":["Direct parameter identification","Machine learning","Convolutional neural networks","Strain rate dependency","Fiber reinforced plastics","woven composites","segmentation","synthetic training data","x-ray computed tomography"],"user_id":"105344","project":[{"_id":"130","name":"TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten"},{"_id":"137","name":"TRR 285 - Subproject A03"},{"_id":"131","name":"TRR 285 - Project Area A"}],"_id":"62078","status":"public","abstract":[{"text":"Fiber reinforced plastics (FRP) exhibit strongly non-linear deformation behavior. To capture this in simulations, intricate models with a variety of parameters are typically used. The identification of values for such parameters is highly challenging and requires in depth understanding of the model itself. Machine learning (ML) is a promising approach for alleviating this challenge by directly predicting parameters based on experimental results. So far, this works mostly for purely artificial data. In this work, two approaches to generalize to experimental data are investigated: a sequential approach, leveraging understanding of the constitutive model and a direct, purely data driven approach. This is exemplary carried out for a highly non-linear strain rate dependent constitutive model for the shear behavior of FRP.The sequential model is found to work better on both artificial and experimental data. It is capable of extracting well suited parameters from the artificial data under realistic conditions. For the experimental data, the model performance depends on the composition of the experimental curves, varying between excellently suiting and reasonable predictions. Taking the expert knowledge into account for ML-model training led to far better results than the purely data driven approach. Robustifying the model predictions on experimental data promises further improvement. ","lang":"eng"}],"type":"conference","publication":"ECCM21 - Proceedings of the 21st European Conference on Composite Materials","doi":"10.60691/yj56-np80","title":"Direct parameter identification for highly nonlinear strain rate dependent constitutive models using machine learning","author":[{"first_name":"Johannes","id":"105344","full_name":"Gerritzen, Johannes","last_name":"Gerritzen","orcid":"0000-0002-0169-8602"},{"first_name":"Andreas","last_name":"Hornig","full_name":"Hornig, Andreas"},{"last_name":"Winkler","full_name":"Winkler, Peter","first_name":"Peter"},{"last_name":"Gude","full_name":"Gude, Maik","first_name":"Maik"}],"date_created":"2025-11-04T12:47:06Z","volume":3,"date_updated":"2026-02-27T06:46:21Z","publisher":"European Society for Composite Materials (ESCM)","citation":{"ama":"Gerritzen J, Hornig A, Winkler P, Gude M. Direct parameter identification for highly nonlinear strain rate dependent constitutive models using machine learning. In: <i>ECCM21 - Proceedings of the 21st European Conference on Composite Materials</i>. Vol 3. European Society for Composite Materials (ESCM); 2024:1252–1259. doi:<a href=\"https://doi.org/10.60691/yj56-np80\">10.60691/yj56-np80</a>","apa":"Gerritzen, J., Hornig, A., Winkler, P., &#38; Gude, M. (2024). Direct parameter identification for highly nonlinear strain rate dependent constitutive models using machine learning. <i>ECCM21 - Proceedings of the 21st European Conference on Composite Materials</i>, <i>3</i>, 1252–1259. <a href=\"https://doi.org/10.60691/yj56-np80\">https://doi.org/10.60691/yj56-np80</a>","short":"J. Gerritzen, A. Hornig, P. Winkler, M. Gude, in: ECCM21 - Proceedings of the 21st European Conference on Composite Materials, European Society for Composite Materials (ESCM), 2024, pp. 1252–1259.","bibtex":"@inproceedings{Gerritzen_Hornig_Winkler_Gude_2024, title={Direct parameter identification for highly nonlinear strain rate dependent constitutive models using machine learning}, volume={3}, DOI={<a href=\"https://doi.org/10.60691/yj56-np80\">10.60691/yj56-np80</a>}, booktitle={ECCM21 - Proceedings of the 21st European Conference on Composite Materials}, publisher={European Society for Composite Materials (ESCM)}, author={Gerritzen, Johannes and Hornig, Andreas and Winkler, Peter and Gude, Maik}, year={2024}, pages={1252–1259} }","mla":"Gerritzen, Johannes, et al. “Direct Parameter Identification for Highly Nonlinear Strain Rate Dependent Constitutive Models Using Machine Learning.” <i>ECCM21 - Proceedings of the 21st European Conference on Composite Materials</i>, vol. 3, European Society for Composite Materials (ESCM), 2024, pp. 1252–1259, doi:<a href=\"https://doi.org/10.60691/yj56-np80\">10.60691/yj56-np80</a>.","ieee":"J. Gerritzen, A. Hornig, P. Winkler, and M. Gude, “Direct parameter identification for highly nonlinear strain rate dependent constitutive models using machine learning,” in <i>ECCM21 - Proceedings of the 21st European Conference on Composite Materials</i>, 2024, vol. 3, pp. 1252–1259, doi: <a href=\"https://doi.org/10.60691/yj56-np80\">10.60691/yj56-np80</a>.","chicago":"Gerritzen, Johannes, Andreas Hornig, Peter Winkler, and Maik Gude. “Direct Parameter Identification for Highly Nonlinear Strain Rate Dependent Constitutive Models Using Machine Learning.” In <i>ECCM21 - Proceedings of the 21st European Conference on Composite Materials</i>, 3:1252–1259. European Society for Composite Materials (ESCM), 2024. <a href=\"https://doi.org/10.60691/yj56-np80\">https://doi.org/10.60691/yj56-np80</a>."},"page":"1252–1259","intvolume":"         3","year":"2024","publication_identifier":{"isbn":["978-2-912985-01-9"]}},{"title":"Corrosion behaviour of self-piercing riveted joints with uncoated rivets in high nitrogen steel","doi":"10.1007/s11740-024-01262-6","date_updated":"2026-02-27T10:06:00Z","author":[{"last_name":"Uhe","id":"38131","full_name":"Uhe, Benedikt","first_name":"Benedikt"},{"last_name":"Kuball","full_name":"Kuball, Clara-Maria","first_name":"Clara-Maria"},{"first_name":"Marion","last_name":"Merklein","full_name":"Merklein, Marion"},{"full_name":"Meschut, Gerson","id":"32056","orcid":"0000-0002-2763-1246","last_name":"Meschut","first_name":"Gerson"}],"date_created":"2024-02-01T15:51:01Z","year":"2024","citation":{"bibtex":"@article{Uhe_Kuball_Merklein_Meschut_2024, title={Corrosion behaviour of self-piercing riveted joints with uncoated rivets in high nitrogen steel}, DOI={<a href=\"https://doi.org/10.1007/s11740-024-01262-6\">10.1007/s11740-024-01262-6</a>}, journal={Production Engineering}, author={Uhe, Benedikt and Kuball, Clara-Maria and Merklein, Marion and Meschut, Gerson}, year={2024} }","short":"B. Uhe, C.-M. Kuball, M. Merklein, G. Meschut, Production Engineering (2024).","mla":"Uhe, Benedikt, et al. “Corrosion Behaviour of Self-Piercing Riveted Joints with Uncoated Rivets in High Nitrogen Steel.” <i>Production Engineering</i>, 2024, doi:<a href=\"https://doi.org/10.1007/s11740-024-01262-6\">10.1007/s11740-024-01262-6</a>.","ama":"Uhe B, Kuball C-M, Merklein M, Meschut G. Corrosion behaviour of self-piercing riveted joints with uncoated rivets in high nitrogen steel. <i>Production Engineering</i>. Published online 2024. doi:<a href=\"https://doi.org/10.1007/s11740-024-01262-6\">10.1007/s11740-024-01262-6</a>","apa":"Uhe, B., Kuball, C.-M., Merklein, M., &#38; Meschut, G. (2024). Corrosion behaviour of self-piercing riveted joints with uncoated rivets in high nitrogen steel. <i>Production Engineering</i>. <a href=\"https://doi.org/10.1007/s11740-024-01262-6\">https://doi.org/10.1007/s11740-024-01262-6</a>","ieee":"B. Uhe, C.-M. Kuball, M. Merklein, and G. Meschut, “Corrosion behaviour of self-piercing riveted joints with uncoated rivets in high nitrogen steel,” <i>Production Engineering</i>, 2024, doi: <a href=\"https://doi.org/10.1007/s11740-024-01262-6\">10.1007/s11740-024-01262-6</a>.","chicago":"Uhe, Benedikt, Clara-Maria Kuball, Marion Merklein, and Gerson Meschut. “Corrosion Behaviour of Self-Piercing Riveted Joints with Uncoated Rivets in High Nitrogen Steel.” <i>Production Engineering</i>, 2024. <a href=\"https://doi.org/10.1007/s11740-024-01262-6\">https://doi.org/10.1007/s11740-024-01262-6</a>."},"quality_controlled":"1","language":[{"iso":"eng"}],"_id":"51116","department":[{"_id":"157"}],"user_id":"53912","abstract":[{"lang":"eng","text":"Self-piercing riveting is an established joining technique for lightweight materials. To increase the sustainability of the rivet manufacturing process, the authors of the present paper have developed an approach for shortening the process chain by omitting the heat treatment and rivet coating. To do this, use is made of high nitrogen steel as the rivet material. Successful joining with these rivets has already been proven, and it has also been shown that a competitive joint strength can be achieved with these rivets. Up until now, no studies have been conducted of the corrosion behaviour of uncoated rivets in high nitrogen steel compared to conventional rivets made of heat-treatable steel with a coating of Almac® or zinc-nickel with topcoat, and the corrosion behaviour of joints manufactured with these rivets has also not been investigated. Furthermore, the suitability of rivets in high nitrogen steel for structures undergoing cathodic dip painting has not been evaluated to date. These are therefore the aims of the research work presented in this paper. Corrosion behaviour is tested by exposing rivets and joints to a salt spray atmosphere. Cross-cut tests are conducted in order to classify the adhesion of cathodic dip paint to the different rivet surfaces and materials. The results of the experimental test show that the cathodic dip paint has sufficient adhesion to the uncoated rivets in high nitrogen steel and that these rivets can therefore be used in the manufacture of car bodies. Due to the stainless properties of the high nitrogen steel, better corrosion resistance is seen by comparison to the commonly used coatings of Almac® and zinc-nickel with topcoat. A study of the corrosion behaviour of the joints shows that the rivet head diameter and rivet head position, in particular, are decisive for preventing crevice corrosion under the rivet head and contact corrosion within the joint. "}],"status":"public","publication":"Production Engineering","type":"journal_article"},{"language":[{"iso":"eng"}],"user_id":"76837","department":[{"_id":"149"},{"_id":"321"},{"_id":"9"}],"project":[{"name":"TRR 285 – B01: TRR 285 - Subproject B01","_id":"140"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen Prozessketten","_id":"130"}],"_id":"55638","status":"public","abstract":[{"text":"<jats:p>Abstract. Traditionally, joints are cylindrical and rotationally symmetric. In the present study, non-rotationally symmetric joints are used for joining steel and Glass mat-reinforced thermoplastic sheets (GMT). In addition, the study also analyzes the impact of non-rotational symmetric joint rotation on the load-bearing capacity. Single lap joint specimens were fabricated using the In-Mold assembly technique for joining steel sheets with GMT. Tensile shear tests were performed on different orientations of the joint geometry, and it was observed that changing the joint orientation influences the load-bearing capacity. The joints are constitutively modeled using beam elements and the influence of joint rotation on load distribution is examined through a static simulation study. </jats:p>","lang":"eng"}],"type":"conference","publication":"Materials Research Proceedings","main_file_link":[{"open_access":"1"}],"doi":"10.21741/9781644903131-183","title":"Non-rotationally symmetric joints – Mechanisms and load bearing capacity","author":[{"full_name":"Devulapally, Deekshith Reddy","id":"76837","last_name":"Devulapally","first_name":"Deekshith Reddy"},{"last_name":"Martin","full_name":"Martin, Sven","id":"38177","first_name":"Sven"},{"first_name":"Thomas","id":"553","full_name":"Tröster, Thomas","last_name":"Tröster"}],"date_created":"2024-08-19T08:29:22Z","date_updated":"2026-02-27T10:50:30Z","oa":"1","publisher":"Materials Research Forum LLC","citation":{"bibtex":"@inproceedings{Devulapally_Martin_Tröster_2024, title={Non-rotationally symmetric joints – Mechanisms and load bearing capacity}, DOI={<a href=\"https://doi.org/10.21741/9781644903131-183\">10.21741/9781644903131-183</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Devulapally, Deekshith Reddy and Martin, Sven and Tröster, Thomas}, year={2024} }","short":"D.R. Devulapally, S. Martin, T. Tröster, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.","mla":"Devulapally, Deekshith Reddy, et al. “Non-Rotationally Symmetric Joints – Mechanisms and Load Bearing Capacity.” <i>Materials Research Proceedings</i>, Materials Research Forum LLC, 2024, doi:<a href=\"https://doi.org/10.21741/9781644903131-183\">10.21741/9781644903131-183</a>.","apa":"Devulapally, D. R., Martin, S., &#38; Tröster, T. (2024). Non-rotationally symmetric joints – Mechanisms and load bearing capacity. <i>Materials Research Proceedings</i>. <a href=\"https://doi.org/10.21741/9781644903131-183\">https://doi.org/10.21741/9781644903131-183</a>","ama":"Devulapally DR, Martin S, Tröster T. Non-rotationally symmetric joints – Mechanisms and load bearing capacity. In: <i>Materials Research Proceedings</i>. Materials Research Forum LLC; 2024. doi:<a href=\"https://doi.org/10.21741/9781644903131-183\">10.21741/9781644903131-183</a>","ieee":"D. R. Devulapally, S. Martin, and T. Tröster, “Non-rotationally symmetric joints – Mechanisms and load bearing capacity,” 2024, doi: <a href=\"https://doi.org/10.21741/9781644903131-183\">10.21741/9781644903131-183</a>.","chicago":"Devulapally, Deekshith Reddy, Sven Martin, and Thomas Tröster. “Non-Rotationally Symmetric Joints – Mechanisms and Load Bearing Capacity.” In <i>Materials Research Proceedings</i>. Materials Research Forum LLC, 2024. <a href=\"https://doi.org/10.21741/9781644903131-183\">https://doi.org/10.21741/9781644903131-183</a>."},"year":"2024","publication_status":"published","publication_identifier":{"issn":["2474-395X"]}},{"author":[{"last_name":"Scheidemann","full_name":"Scheidemann, Claus","id":"38259","first_name":"Claus"},{"first_name":"Tobias","full_name":"Hemsel, Tobias","id":"210","last_name":"Hemsel"},{"first_name":"Walter","full_name":"Sextro, Walter","id":"21220","last_name":"Sextro"}],"date_created":"2025-10-08T14:28:33Z","date_updated":"2026-03-02T11:00:14Z","oa":"1","conference":{"start_date":"2024-07-22","name":"21nd International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA)","location":"Hannover, Germany","end_date":"2024-07-26"},"title":"Characteristic behavior of lead-free and lead-containing piezo ring ceramics in ultrasonic transducers","has_accepted_license":"1","citation":{"short":"C. Scheidemann, T. Hemsel, W. Sextro, in: 2024.","bibtex":"@inproceedings{Scheidemann_Hemsel_Sextro_2024, title={Characteristic behavior of lead-free and lead-containing piezo ring ceramics in ultrasonic transducers}, author={Scheidemann, Claus and Hemsel, Tobias and Sextro, Walter}, year={2024} }","mla":"Scheidemann, Claus, et al. <i>Characteristic Behavior of Lead-Free and Lead-Containing Piezo Ring Ceramics in Ultrasonic Transducers</i>. 2024.","apa":"Scheidemann, C., Hemsel, T., &#38; Sextro, W. (2024). <i>Characteristic behavior of lead-free and lead-containing piezo ring ceramics in ultrasonic transducers</i>. 21nd International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Hannover, Germany.","chicago":"Scheidemann, Claus, Tobias Hemsel, and Walter Sextro. “Characteristic Behavior of Lead-Free and Lead-Containing Piezo Ring Ceramics in Ultrasonic Transducers,” 2024.","ieee":"C. Scheidemann, T. Hemsel, and W. Sextro, “Characteristic behavior of lead-free and lead-containing piezo ring ceramics in ultrasonic transducers,” presented at the 21nd International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Hannover, Germany, 2024.","ama":"Scheidemann C, Hemsel T, Sextro W. Characteristic behavior of lead-free and lead-containing piezo ring ceramics in ultrasonic transducers. In: ; 2024."},"year":"2024","user_id":"210","department":[{"_id":"151"}],"_id":"61756","file_date_updated":"2026-03-02T11:00:13Z","language":[{"iso":"eng"}],"ddc":["620"],"type":"conference","file":[{"date_updated":"2026-03-02T11:00:13Z","date_created":"2026-01-30T14:50:06Z","creator":"hemsel","file_size":1984385,"access_level":"open_access","file_name":"IWPMA_2024_Scheidemann.pdf","file_id":"63820","content_type":"application/pdf","relation":"main_file"}],"status":"public"},{"citation":{"chicago":"Rozo Vasquez, Julian , Lukas Kersting, Bahman Arian, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L.” In <i>Lecture Notes in Mechanical Engineering</i>. Cham: Springer International Publishing, 2024. <a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">https://doi.org/10.1007/978-3-031-58006-2_10</a>.","ieee":"J. Rozo Vasquez, L. Kersting, B. Arian, W. Homberg, A. Trächtler, and F. Walther, “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L,” in <i>Lecture Notes in Mechanical Engineering</i>, Cham: Springer International Publishing, 2024.","ama":"Rozo Vasquez J, Kersting L, Arian B, Homberg W, Trächtler A, Walther F. Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L. In: <i>Lecture Notes in Mechanical Engineering</i>. Springer International Publishing; 2024. doi:<a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">10.1007/978-3-031-58006-2_10</a>","apa":"Rozo Vasquez, J., Kersting, L., Arian, B., Homberg, W., Trächtler, A., &#38; Walther, F. (2024). Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L. In <i>Lecture Notes in Mechanical Engineering</i>. Springer International Publishing. <a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">https://doi.org/10.1007/978-3-031-58006-2_10</a>","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.","mla":"Rozo Vasquez, Julian, et al. “Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L.” <i>Lecture Notes in Mechanical Engineering</i>, Springer International Publishing, 2024, doi:<a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">10.1007/978-3-031-58006-2_10</a>.","bibtex":"@inbook{Rozo Vasquez_Kersting_Arian_Homberg_Trächtler_Walther_2024, place={Cham}, title={Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L}, DOI={<a href=\"https://doi.org/10.1007/978-3-031-58006-2_10\">10.1007/978-3-031-58006-2_10</a>}, booktitle={Lecture Notes in Mechanical Engineering}, publisher={Springer International Publishing}, author={Rozo Vasquez, Julian  and Kersting, Lukas and Arian, Bahman and Homberg, Werner and Trächtler, Ansgar and Walther, Frank}, year={2024} }"},"place":"Cham","year":"2024","publication_status":"published","publication_identifier":{"isbn":["9783031580055","9783031580062"],"issn":["2195-4356","2195-4364"]},"quality_controlled":"1","doi":"10.1007/978-3-031-58006-2_10","title":"Soft Sensor Model of Phase Transformation During Flow Forming of Metastable Austenitic Steel AISI 304L","author":[{"full_name":"Rozo Vasquez, Julian ","last_name":"Rozo Vasquez","first_name":"Julian "},{"last_name":"Kersting","full_name":"Kersting, Lukas","first_name":"Lukas"},{"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","last_name":"Trächtler","full_name":"Trächtler, Ansgar","id":"552"},{"full_name":"Walther, Frank","last_name":"Walther","first_name":"Frank"}],"date_created":"2024-11-18T10:24:06Z","publisher":"Springer International Publishing","date_updated":"2024-11-18T10:39:03Z","status":"public","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."}],"type":"book_chapter","publication":"Lecture Notes in Mechanical Engineering","language":[{"iso":"eng"}],"user_id":"41470","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"_id":"57190"},{"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."}],"status":"public","type":"conference","language":[{"iso":"eng"}],"_id":"57189","department":[{"_id":"153"},{"_id":"241"},{"_id":"156"}],"user_id":"41470","year":"2024","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.","chicago":"Rozo Vasquez, Julian , Hanigah Kanagarajah, Bahman Arian, Lukas Kersting, Werner Homberg, Ansgar Trächtler, and Frank Walther. “Barkhausen Noise- and Eddy Current-Based Measurements for Online Detection of Deformation-Induced Martensite during Flow Forming of Metastable Austenitic Steel AISI 304L.” Authorea, Inc., 2024.","ieee":"J. Rozo Vasquez <i>et al.</i>, “Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L,” 2024.","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} }","short":"J. Rozo Vasquez, H. Kanagarajah, B. Arian, L. Kersting, W. Homberg, A. Trächtler, F. Walther, in: Authorea, Inc., 2024.","mla":"Rozo Vasquez, Julian, et al. <i>Barkhausen Noise- and Eddy Current-Based Measurements for Online Detection of Deformation-Induced Martensite during Flow Forming of Metastable Austenitic Steel AISI 304L</i>. Authorea, Inc., 2024.","apa":"Rozo Vasquez, J., Kanagarajah, H., Arian, B., Kersting, L., Homberg, W., Trächtler, A., &#38; Walther, F. (2024). <i>Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L</i>."},"quality_controlled":"1","publication_status":"published","title":"Barkhausen noise- and eddy current-based measurements for online detection of deformation-induced martensite during flow forming of metastable austenitic steel AISI 304L","date_updated":"2024-11-18T10:39:19Z","publisher":"Authorea, Inc.","author":[{"first_name":"Julian ","full_name":"Rozo Vasquez, Julian ","last_name":"Rozo Vasquez"},{"first_name":"Hanigah","last_name":"Kanagarajah","full_name":"Kanagarajah, Hanigah"},{"full_name":"Arian, Bahman","id":"36287","last_name":"Arian","first_name":"Bahman"},{"first_name":"Lukas","full_name":"Kersting, Lukas","last_name":"Kersting"},{"first_name":"Werner","last_name":"Homberg","id":"233","full_name":"Homberg, Werner"},{"full_name":"Trächtler, Ansgar","id":"552","last_name":"Trächtler","first_name":"Ansgar"},{"last_name":"Walther","full_name":"Walther, Frank","first_name":"Frank"}],"date_created":"2024-11-18T10:22:34Z"},{"_id":"57175","user_id":"41470","department":[{"_id":"153"},{"_id":"241"}],"language":[{"iso":"eng"}],"type":"journal_article","publication":"Procedia Computer Science","status":"public","date_updated":"2024-11-18T10:38:39Z","publisher":"Elsevier BV","author":[{"full_name":"Bathelt, Lukas","last_name":"Bathelt","first_name":"Lukas"},{"first_name":"Eugen","id":"7904","full_name":"Djakow, Eugen","last_name":"Djakow"},{"full_name":"Henke, Christian","last_name":"Henke","first_name":"Christian"},{"full_name":"Trächtler, Ansgar","id":"552","last_name":"Trächtler","first_name":"Ansgar"}],"date_created":"2024-11-18T10:09:22Z","volume":232,"title":"Innovative measurement system for saber curvature observation in straightening processes","doi":"10.1016/j.procs.2024.02.024","publication_status":"published","quality_controlled":"1","publication_identifier":{"issn":["1877-0509"]},"year":"2024","citation":{"mla":"Bathelt, Lukas, et al. “Innovative Measurement System for Saber Curvature Observation in Straightening Processes.” <i>Procedia Computer Science</i>, vol. 232, Elsevier BV, 2024, pp. 2018–27, doi:<a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">10.1016/j.procs.2024.02.024</a>.","bibtex":"@article{Bathelt_Djakow_Henke_Trächtler_2024, title={Innovative measurement system for saber curvature observation in straightening processes}, volume={232}, DOI={<a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">10.1016/j.procs.2024.02.024</a>}, journal={Procedia Computer Science}, publisher={Elsevier BV}, author={Bathelt, Lukas and Djakow, Eugen and Henke, Christian and Trächtler, Ansgar}, year={2024}, pages={2018–2027} }","short":"L. Bathelt, E. Djakow, C. Henke, A. Trächtler, Procedia Computer Science 232 (2024) 2018–2027.","apa":"Bathelt, L., Djakow, E., Henke, C., &#38; Trächtler, A. (2024). Innovative measurement system for saber curvature observation in straightening processes. <i>Procedia Computer Science</i>, <i>232</i>, 2018–2027. <a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">https://doi.org/10.1016/j.procs.2024.02.024</a>","ama":"Bathelt L, Djakow E, Henke C, Trächtler A. Innovative measurement system for saber curvature observation in straightening processes. <i>Procedia Computer Science</i>. 2024;232:2018-2027. doi:<a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">10.1016/j.procs.2024.02.024</a>","ieee":"L. Bathelt, E. Djakow, C. Henke, and A. Trächtler, “Innovative measurement system for saber curvature observation in straightening processes,” <i>Procedia Computer Science</i>, vol. 232, pp. 2018–2027, 2024, doi: <a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">10.1016/j.procs.2024.02.024</a>.","chicago":"Bathelt, Lukas, Eugen Djakow, Christian Henke, and Ansgar Trächtler. “Innovative Measurement System for Saber Curvature Observation in Straightening Processes.” <i>Procedia Computer Science</i> 232 (2024): 2018–27. <a href=\"https://doi.org/10.1016/j.procs.2024.02.024\">https://doi.org/10.1016/j.procs.2024.02.024</a>."},"page":"2018-2027","intvolume":"       232"},{"publication_status":"published","quality_controlled":"1","year":"2024","citation":{"apa":"Reiling, F., Henke, C., Hunstig, M., Gröger, S., &#38; Trächtler, A. (2024). Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding. <i>2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)</i>. <a href=\"https://doi.org/10.1109/aim55361.2024.10637123\">https://doi.org/10.1109/aim55361.2024.10637123</a>","bibtex":"@inproceedings{Reiling_Henke_Hunstig_Gröger_Trächtler_2024, title={Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding}, DOI={<a href=\"https://doi.org/10.1109/aim55361.2024.10637123\">10.1109/aim55361.2024.10637123</a>}, booktitle={2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)}, publisher={IEEE}, author={Reiling, Fabian and Henke, Christian and Hunstig, Matthias and Gröger, Stefan and Trächtler, Ansgar}, year={2024} }","short":"F. Reiling, C. Henke, M. Hunstig, S. Gröger, A. Trächtler, in: 2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), IEEE, 2024.","mla":"Reiling, Fabian, et al. “Batch Constrained Multi-Objective Bayesian Optimization Using the Example of Ultrasonic Wire Bonding.” <i>2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)</i>, IEEE, 2024, doi:<a href=\"https://doi.org/10.1109/aim55361.2024.10637123\">10.1109/aim55361.2024.10637123</a>.","ama":"Reiling F, Henke C, Hunstig M, Gröger S, Trächtler A. Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding. In: <i>2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)</i>. IEEE; 2024. doi:<a href=\"https://doi.org/10.1109/aim55361.2024.10637123\">10.1109/aim55361.2024.10637123</a>","ieee":"F. Reiling, C. Henke, M. Hunstig, S. Gröger, and A. Trächtler, “Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding,” 2024, doi: <a href=\"https://doi.org/10.1109/aim55361.2024.10637123\">10.1109/aim55361.2024.10637123</a>.","chicago":"Reiling, Fabian, Christian Henke, Matthias Hunstig, Stefan Gröger, and Ansgar Trächtler. “Batch Constrained Multi-Objective Bayesian Optimization Using the Example of Ultrasonic Wire Bonding.” In <i>2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)</i>. IEEE, 2024. <a href=\"https://doi.org/10.1109/aim55361.2024.10637123\">https://doi.org/10.1109/aim55361.2024.10637123</a>."},"publisher":"IEEE","date_updated":"2024-11-18T10:40:23Z","author":[{"last_name":"Reiling","full_name":"Reiling, Fabian","first_name":"Fabian"},{"first_name":"Christian","last_name":"Henke","full_name":"Henke, Christian"},{"full_name":"Hunstig, Matthias","last_name":"Hunstig","first_name":"Matthias"},{"first_name":"Stefan","full_name":"Gröger, Stefan","last_name":"Gröger"},{"first_name":"Ansgar","last_name":"Trächtler","full_name":"Trächtler, Ansgar","id":"552"}],"date_created":"2024-11-18T10:18:18Z","title":"Batch constrained multi-objective Bayesian optimization using the example of ultrasonic wire bonding","doi":"10.1109/aim55361.2024.10637123","type":"conference","publication":"2024 IEEE International Conference on Advanced Intelligent Mechatronics (AIM)","status":"public","_id":"57185","user_id":"41470","department":[{"_id":"153"},{"_id":"241"}],"language":[{"iso":"eng"}]},{"language":[{"iso":"eng"}],"_id":"57188","user_id":"41470","department":[{"_id":"153"},{"_id":"241"}],"status":"public","type":"conference","publication":"2024 IEEE Conference on Technologies for Sustainability (SusTech)","title":"A comprehensive test infrastructure for the evaluation of energy management systems of the household and grid level","doi":"10.1109/sustech60925.2024.10553455","date_updated":"2024-11-18T10:39:28Z","publisher":"IEEE","author":[{"last_name":"Stieren","full_name":"Stieren, Stephan","first_name":"Stephan"},{"first_name":"Achim","full_name":"Werner, Achim","last_name":"Werner"},{"last_name":"Henke","full_name":"Henke, Christian","first_name":"Christian"},{"first_name":"Ansgar","last_name":"Trächtler","full_name":"Trächtler, Ansgar","id":"552"}],"date_created":"2024-11-18T10:21:54Z","year":"2024","citation":{"short":"S. Stieren, A. Werner, C. Henke, A. Trächtler, in: 2024 IEEE Conference on Technologies for Sustainability (SusTech), IEEE, 2024.","bibtex":"@inproceedings{Stieren_Werner_Henke_Trächtler_2024, title={A comprehensive test infrastructure for the evaluation of energy management systems of the household and grid level}, DOI={<a href=\"https://doi.org/10.1109/sustech60925.2024.10553455\">10.1109/sustech60925.2024.10553455</a>}, booktitle={2024 IEEE Conference on Technologies for Sustainability (SusTech)}, publisher={IEEE}, author={Stieren, Stephan and Werner, Achim and Henke, Christian and Trächtler, Ansgar}, year={2024} }","mla":"Stieren, Stephan, et al. “A Comprehensive Test Infrastructure for the Evaluation of Energy Management Systems of the Household and Grid Level.” <i>2024 IEEE Conference on Technologies for Sustainability (SusTech)</i>, IEEE, 2024, doi:<a href=\"https://doi.org/10.1109/sustech60925.2024.10553455\">10.1109/sustech60925.2024.10553455</a>.","apa":"Stieren, S., Werner, A., Henke, C., &#38; Trächtler, A. (2024). A comprehensive test infrastructure for the evaluation of energy management systems of the household and grid level. <i>2024 IEEE Conference on Technologies for Sustainability (SusTech)</i>. <a href=\"https://doi.org/10.1109/sustech60925.2024.10553455\">https://doi.org/10.1109/sustech60925.2024.10553455</a>","chicago":"Stieren, Stephan, Achim Werner, Christian Henke, and Ansgar Trächtler. “A Comprehensive Test Infrastructure for the Evaluation of Energy Management Systems of the Household and Grid Level.” In <i>2024 IEEE Conference on Technologies for Sustainability (SusTech)</i>. IEEE, 2024. <a href=\"https://doi.org/10.1109/sustech60925.2024.10553455\">https://doi.org/10.1109/sustech60925.2024.10553455</a>.","ieee":"S. Stieren, A. Werner, C. Henke, and A. Trächtler, “A comprehensive test infrastructure for the evaluation of energy management systems of the household and grid level,” 2024, doi: <a href=\"https://doi.org/10.1109/sustech60925.2024.10553455\">10.1109/sustech60925.2024.10553455</a>.","ama":"Stieren S, Werner A, Henke C, Trächtler A. A comprehensive test infrastructure for the evaluation of energy management systems of the household and grid level. In: <i>2024 IEEE Conference on Technologies for Sustainability (SusTech)</i>. IEEE; 2024. doi:<a href=\"https://doi.org/10.1109/sustech60925.2024.10553455\">10.1109/sustech60925.2024.10553455</a>"},"publication_status":"published","quality_controlled":"1"},{"type":"conference","publication":"2024 IEEE International Systems Conference (SysCon)","status":"public","_id":"57187","user_id":"41470","department":[{"_id":"153"},{"_id":"241"}],"language":[{"iso":"eng"}],"publication_status":"published","quality_controlled":"1","year":"2024","citation":{"ama":"Stieren S, Lenger L, Kliem M, Henke C, Trächtler A. Development of digital business models for holistic energy management on device, home and grid level. In: <i>2024 IEEE International Systems Conference (SysCon)</i>. IEEE; 2024. doi:<a href=\"https://doi.org/10.1109/syscon61195.2024.10553440\">10.1109/syscon61195.2024.10553440</a>","chicago":"Stieren, Stephan, Luca Lenger, Moritz Kliem, Christian Henke, and Ansgar Trächtler. “Development of Digital Business Models for Holistic Energy Management on Device, Home and Grid Level.” In <i>2024 IEEE International Systems Conference (SysCon)</i>. IEEE, 2024. <a href=\"https://doi.org/10.1109/syscon61195.2024.10553440\">https://doi.org/10.1109/syscon61195.2024.10553440</a>.","ieee":"S. Stieren, L. Lenger, M. Kliem, C. Henke, and A. Trächtler, “Development of digital business models for holistic energy management on device, home and grid level,” 2024, doi: <a href=\"https://doi.org/10.1109/syscon61195.2024.10553440\">10.1109/syscon61195.2024.10553440</a>.","apa":"Stieren, S., Lenger, L., Kliem, M., Henke, C., &#38; Trächtler, A. (2024). Development of digital business models for holistic energy management on device, home and grid level. <i>2024 IEEE International Systems Conference (SysCon)</i>. <a href=\"https://doi.org/10.1109/syscon61195.2024.10553440\">https://doi.org/10.1109/syscon61195.2024.10553440</a>","bibtex":"@inproceedings{Stieren_Lenger_Kliem_Henke_Trächtler_2024, title={Development of digital business models for holistic energy management on device, home and grid level}, DOI={<a href=\"https://doi.org/10.1109/syscon61195.2024.10553440\">10.1109/syscon61195.2024.10553440</a>}, booktitle={2024 IEEE International Systems Conference (SysCon)}, publisher={IEEE}, author={Stieren, Stephan and Lenger, Luca and Kliem, Moritz and Henke, Christian and Trächtler, Ansgar}, year={2024} }","mla":"Stieren, Stephan, et al. “Development of Digital Business Models for Holistic Energy Management on Device, Home and Grid Level.” <i>2024 IEEE International Systems Conference (SysCon)</i>, IEEE, 2024, doi:<a href=\"https://doi.org/10.1109/syscon61195.2024.10553440\">10.1109/syscon61195.2024.10553440</a>.","short":"S. Stieren, L. Lenger, M. Kliem, C. Henke, A. Trächtler, in: 2024 IEEE International Systems Conference (SysCon), IEEE, 2024."},"publisher":"IEEE","date_updated":"2024-11-18T10:39:56Z","date_created":"2024-11-18T10:21:17Z","author":[{"first_name":"Stephan","last_name":"Stieren","full_name":"Stieren, Stephan"},{"full_name":"Lenger, Luca","last_name":"Lenger","first_name":"Luca"},{"last_name":"Kliem","full_name":"Kliem, Moritz","first_name":"Moritz"},{"last_name":"Henke","full_name":"Henke, Christian","first_name":"Christian"},{"last_name":"Trächtler","full_name":"Trächtler, Ansgar","id":"552","first_name":"Ansgar"}],"title":"Development of digital business models for holistic energy management on device, home and grid level","doi":"10.1109/syscon61195.2024.10553440"},{"publication":"AIAA SCITECH 2024 Forum","type":"conference","status":"public","department":[{"_id":"153"},{"_id":"241"}],"user_id":"41470","_id":"57184","language":[{"iso":"eng"}],"quality_controlled":"1","publication_status":"published","citation":{"apa":"Poy, Y. H., Zarnack, M., Henkenjohann, M., &#38; Nolte, U. (2024). Aerodynamic Derivatives Identification of a Fixed-Wing UAV using Flight Data. <i>AIAA SCITECH 2024 Forum</i>. <a href=\"https://doi.org/10.2514/6.2024-0248\">https://doi.org/10.2514/6.2024-0248</a>","short":"Y.H. Poy, M. Zarnack, M. Henkenjohann, U. Nolte, in: AIAA SCITECH 2024 Forum, American Institute of Aeronautics and Astronautics, 2024.","bibtex":"@inproceedings{Poy_Zarnack_Henkenjohann_Nolte_2024, title={Aerodynamic Derivatives Identification of a Fixed-Wing UAV using Flight Data}, DOI={<a href=\"https://doi.org/10.2514/6.2024-0248\">10.2514/6.2024-0248</a>}, booktitle={AIAA SCITECH 2024 Forum}, publisher={American Institute of Aeronautics and Astronautics}, author={Poy, Yi Han and Zarnack, Martin and Henkenjohann, Mark and Nolte, Udo}, year={2024} }","mla":"Poy, Yi Han, et al. “Aerodynamic Derivatives Identification of a Fixed-Wing UAV Using Flight Data.” <i>AIAA SCITECH 2024 Forum</i>, American Institute of Aeronautics and Astronautics, 2024, doi:<a href=\"https://doi.org/10.2514/6.2024-0248\">10.2514/6.2024-0248</a>.","ama":"Poy YH, Zarnack M, Henkenjohann M, Nolte U. Aerodynamic Derivatives Identification of a Fixed-Wing UAV using Flight Data. In: <i>AIAA SCITECH 2024 Forum</i>. American Institute of Aeronautics and Astronautics; 2024. doi:<a href=\"https://doi.org/10.2514/6.2024-0248\">10.2514/6.2024-0248</a>","chicago":"Poy, Yi Han, Martin Zarnack, Mark Henkenjohann, and Udo Nolte. “Aerodynamic Derivatives Identification of a Fixed-Wing UAV Using Flight Data.” In <i>AIAA SCITECH 2024 Forum</i>. American Institute of Aeronautics and Astronautics, 2024. <a href=\"https://doi.org/10.2514/6.2024-0248\">https://doi.org/10.2514/6.2024-0248</a>.","ieee":"Y. H. Poy, M. Zarnack, M. Henkenjohann, and U. Nolte, “Aerodynamic Derivatives Identification of a Fixed-Wing UAV using Flight Data,” 2024, doi: <a href=\"https://doi.org/10.2514/6.2024-0248\">10.2514/6.2024-0248</a>."},"year":"2024","date_created":"2024-11-18T10:17:33Z","author":[{"full_name":"Poy, Yi Han","last_name":"Poy","first_name":"Yi Han"},{"last_name":"Zarnack","full_name":"Zarnack, Martin","first_name":"Martin"},{"last_name":"Henkenjohann","full_name":"Henkenjohann, Mark","first_name":"Mark"},{"full_name":"Nolte, Udo","last_name":"Nolte","first_name":"Udo"}],"publisher":"American Institute of Aeronautics and Astronautics","date_updated":"2024-11-18T10:40:33Z","doi":"10.2514/6.2024-0248","title":"Aerodynamic Derivatives Identification of a Fixed-Wing UAV using Flight Data"},{"type":"conference","publication":"Proceedings of the 4th IFSA Winter Conference on Automation, Robotics and Communications for Industry 4.0/5.0 (ARCI 2024)","status":"public","user_id":"41470","department":[{"_id":"153"},{"_id":"241"}],"_id":"57186","language":[{"iso":"eng"}],"quality_controlled":"1","citation":{"short":"R. Schmidt, S. Schütz, S. Prinz, C. Henke, A. Trächtler, in: Proceedings of the 4th IFSA Winter Conference on Automation, Robotics and Communications for Industry 4.0/5.0 (ARCI 2024), 2024.","bibtex":"@inproceedings{Schmidt_Schütz_Prinz_Henke_Trächtler_2024, title={Optimizing Welding Efficiency: A First Approach for an Automated Mobile Welding Robot}, booktitle={Proceedings of the 4th IFSA Winter Conference on Automation, Robotics and Communications for Industry 4.0/5.0 (ARCI 2024)}, author={Schmidt, Robin and Schütz, Stefan and Prinz, Sebastian and Henke, Christian and Trächtler, Ansgar}, year={2024} }","mla":"Schmidt, Robin, et al. “Optimizing Welding Efficiency: A First Approach for an Automated Mobile Welding Robot.” <i>Proceedings of the 4th IFSA Winter Conference on Automation, Robotics and Communications for Industry 4.0/5.0 (ARCI 2024)</i>, 2024.","apa":"Schmidt, R., Schütz, S., Prinz, S., Henke, C., &#38; Trächtler, A. (2024). Optimizing Welding Efficiency: A First Approach for an Automated Mobile Welding Robot. <i>Proceedings of the 4th IFSA Winter Conference on Automation, Robotics and Communications for Industry 4.0/5.0 (ARCI 2024)</i>.","ama":"Schmidt R, Schütz S, Prinz S, Henke C, Trächtler A. Optimizing Welding Efficiency: A First Approach for an Automated Mobile Welding Robot. In: <i>Proceedings of the 4th IFSA Winter Conference on Automation, Robotics and Communications for Industry 4.0/5.0 (ARCI 2024)</i>. ; 2024.","chicago":"Schmidt, Robin, Stefan Schütz, Sebastian Prinz, Christian Henke, and Ansgar Trächtler. “Optimizing Welding Efficiency: A First Approach for an Automated Mobile Welding Robot.” In <i>Proceedings of the 4th IFSA Winter Conference on Automation, Robotics and Communications for Industry 4.0/5.0 (ARCI 2024)</i>, 2024.","ieee":"R. Schmidt, S. Schütz, S. Prinz, C. Henke, and A. Trächtler, “Optimizing Welding Efficiency: A First Approach for an Automated Mobile Welding Robot,” 2024."},"year":"2024","author":[{"first_name":"Robin","full_name":"Schmidt, Robin","last_name":"Schmidt"},{"first_name":"Stefan","last_name":"Schütz","full_name":"Schütz, Stefan"},{"first_name":"Sebastian","full_name":"Prinz, Sebastian","last_name":"Prinz"},{"first_name":"Christian","full_name":"Henke, Christian","last_name":"Henke"},{"full_name":"Trächtler, Ansgar","id":"552","last_name":"Trächtler","first_name":"Ansgar"}],"date_created":"2024-11-18T10:20:58Z","date_updated":"2024-11-18T10:40:13Z","title":"Optimizing Welding Efficiency: A First Approach for an Automated Mobile Welding Robot"},{"intvolume":"        13","citation":{"chicago":"Henkenjohann, Mark, Udo Nolte, Fabian Sion, Christian Henke, and Ansgar Trächtler. “Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers.” <i>Actuators</i> 13, no. 5 (2024). <a href=\"https://doi.org/10.3390/act13050187\">https://doi.org/10.3390/act13050187</a>.","ieee":"M. Henkenjohann, U. Nolte, F. Sion, C. Henke, and A. Trächtler, “Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers,” <i>Actuators</i>, vol. 13, no. 5, Art. no. 187, 2024, doi: <a href=\"https://doi.org/10.3390/act13050187\">10.3390/act13050187</a>.","ama":"Henkenjohann M, Nolte U, Sion F, Henke C, Trächtler A. Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers. <i>Actuators</i>. 2024;13(5). doi:<a href=\"https://doi.org/10.3390/act13050187\">10.3390/act13050187</a>","mla":"Henkenjohann, Mark, et al. “Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers.” <i>Actuators</i>, vol. 13, no. 5, 187, MDPI AG, 2024, doi:<a href=\"https://doi.org/10.3390/act13050187\">10.3390/act13050187</a>.","bibtex":"@article{Henkenjohann_Nolte_Sion_Henke_Trächtler_2024, title={Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers}, volume={13}, DOI={<a href=\"https://doi.org/10.3390/act13050187\">10.3390/act13050187</a>}, number={5187}, journal={Actuators}, publisher={MDPI AG}, author={Henkenjohann, Mark and Nolte, Udo and Sion, Fabian and Henke, Christian and Trächtler, Ansgar}, year={2024} }","short":"M. Henkenjohann, U. Nolte, F. Sion, C. Henke, A. Trächtler, Actuators 13 (2024).","apa":"Henkenjohann, M., Nolte, U., Sion, F., Henke, C., &#38; Trächtler, A. (2024). Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers. <i>Actuators</i>, <i>13</i>(5), Article 187. <a href=\"https://doi.org/10.3390/act13050187\">https://doi.org/10.3390/act13050187</a>"},"publication_identifier":{"issn":["2076-0825"]},"publication_status":"published","doi":"10.3390/act13050187","date_updated":"2024-11-18T10:42:19Z","volume":13,"author":[{"first_name":"Mark","last_name":"Henkenjohann","full_name":"Henkenjohann, Mark"},{"first_name":"Udo","full_name":"Nolte, Udo","last_name":"Nolte"},{"full_name":"Sion, Fabian","last_name":"Sion","first_name":"Fabian"},{"full_name":"Henke, Christian","last_name":"Henke","first_name":"Christian"},{"first_name":"Ansgar","full_name":"Trächtler, Ansgar","id":"552","last_name":"Trächtler"}],"status":"public","type":"journal_article","article_number":"187","_id":"57176","department":[{"_id":"153"},{"_id":"241"}],"user_id":"41470","year":"2024","quality_controlled":"1","issue":"5","title":"Parameter Tuning Approach for Incremental Nonlinear Dynamic Inversion-Based Flight Controllers","publisher":"MDPI AG","date_created":"2024-11-18T10:09:58Z","abstract":[{"text":"Incremental nonlinear dynamic inversion (INDI) is a widely used approach to controlling UAVs with highly nonlinear dynamics. One key element of INDI-based controllers is the control allocation realizing pseudo controls using available actuators. However, the tracking of commanded pseudo controls is not the only objective considered during control allocation. Since the approach only works locally due to linearization and the solution is often ambiguous, additional aspects like control efforts or penalizing the deviation of certain states must be considered. Conducting the control allocation by solving a quadratic program this results in a considerable number of weighting parameters, which must be tuned during control design. Currently, this is conducted manually and is therefore time consuming. An automated approach for tuning these parameters is therefore highly beneficial. Thus, this paper presents and evaluates a model-based approach automatically tuning the control allocation parameters of a tiltrotor VTOL using an optimization algorithm. This optimization algorithm searches for optimal parameters minimizing a cost functional that reflects the design target. This cost functional is calculated based on a test mission for the VTOL which is conducted within a simulation environment. The test mission represents the common operating range of the VTOL. The simulation environment consists of an aircraft model as well as a model of the INDI-based controller which is dependent on the control allocation parameters. On this basis, model-based optimization is conducted and the optimal parameters are identified. Finally, successful real-world tests on a 4-degrees-of-freedom testbench using the identified parameters are presented. Since the control allocation parameters can significantly influence the aircraft’s stability, the 4-DOF testbench for the aircraft is required for rapid validation of the parameters at a minimum amount of risk.","lang":"eng"}],"publication":"Actuators","language":[{"iso":"eng"}]},{"date_updated":"2024-11-18T10:42:55Z","publisher":"Materials Research Forum LLC","volume":44,"date_created":"2024-11-18T10:06:17Z","author":[{"full_name":"Arian, Bahman","id":"36287","last_name":"Arian","first_name":"Bahman"},{"first_name":"Werner","last_name":"Homberg","id":"233","full_name":"Homberg, Werner"},{"first_name":"Lukas","full_name":"Kersting, Lukas","last_name":"Kersting"},{"last_name":"Trächtler","id":"552","full_name":"Trächtler, Ansgar","first_name":"Ansgar"},{"first_name":"Julian","last_name":"Rozo Vasquez","full_name":"Rozo Vasquez, Julian"},{"first_name":"Frank","last_name":"Walther","full_name":"Walther, Frank"}],"title":"α’-martensite grading techniques in reverse flow forming of AISI 304L","doi":"10.21741/9781644903254-76","quality_controlled":"1","publication_identifier":{"issn":["2474-395X"]},"publication_status":"published","year":"2024","intvolume":"        44","citation":{"short":"B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, F. Walther, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.","mla":"Arian, Bahman, et al. “α’-Martensite Grading Techniques in Reverse Flow Forming of AISI 304L.” <i>Materials Research Proceedings</i>, vol. 44, Materials Research Forum LLC, 2024, doi:<a href=\"https://doi.org/10.21741/9781644903254-76\">10.21741/9781644903254-76</a>.","bibtex":"@inproceedings{Arian_Homberg_Kersting_Trächtler_Rozo Vasquez_Walther_2024, title={α’-martensite grading techniques in reverse flow forming of AISI 304L}, volume={44}, DOI={<a href=\"https://doi.org/10.21741/9781644903254-76\">10.21741/9781644903254-76</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Arian, Bahman and Homberg, Werner and Kersting, Lukas and Trächtler, Ansgar and Rozo Vasquez, Julian and Walther, Frank}, year={2024} }","apa":"Arian, B., Homberg, W., Kersting, L., Trächtler, A., Rozo Vasquez, J., &#38; Walther, F. (2024). α’-martensite grading techniques in reverse flow forming of AISI 304L. <i>Materials Research Proceedings</i>, <i>44</i>. <a href=\"https://doi.org/10.21741/9781644903254-76\">https://doi.org/10.21741/9781644903254-76</a>","ama":"Arian B, Homberg W, Kersting L, Trächtler A, Rozo Vasquez J, Walther F. α’-martensite grading techniques in reverse flow forming of AISI 304L. In: <i>Materials Research Proceedings</i>. Vol 44. Materials Research Forum LLC; 2024. doi:<a href=\"https://doi.org/10.21741/9781644903254-76\">10.21741/9781644903254-76</a>","ieee":"B. Arian, W. Homberg, L. Kersting, A. Trächtler, J. Rozo Vasquez, and F. Walther, “α’-martensite grading techniques in reverse flow forming of AISI 304L,” in <i>Materials Research Proceedings</i>, 2024, vol. 44, doi: <a href=\"https://doi.org/10.21741/9781644903254-76\">10.21741/9781644903254-76</a>.","chicago":"Arian, Bahman, Werner Homberg, Lukas Kersting, Ansgar Trächtler, Julian Rozo Vasquez, and Frank Walther. “α’-Martensite Grading Techniques in Reverse Flow Forming of AISI 304L.” In <i>Materials Research Proceedings</i>, Vol. 44. Materials Research Forum LLC, 2024. <a href=\"https://doi.org/10.21741/9781644903254-76\">https://doi.org/10.21741/9781644903254-76</a>."},"_id":"57173","department":[{"_id":"241"},{"_id":"153"},{"_id":"156"}],"user_id":"41470","language":[{"iso":"eng"}],"publication":"Materials Research Proceedings","type":"conference","abstract":[{"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.","lang":"eng"}],"status":"public"},{"type":"conference","publication":"Materials Research Proceedings","status":"public","abstract":[{"text":"Increasing the sustainability and resource efficiency of forming processes is one of today's major goals. High-strength wire materials are usually available as strip material and are subjected to a downstream forming process such as punch-bending to produce parts for the electronics industry, for example. During the manufacturing process of the semi-finished product, residual stresses and plastic deformations are introduced into the wire by rolling and drawing processes. Straightening machines are used in the production lines to compensate for these. To increase the sustainability of these production lines, the straightening process is an essential step. Before the continuous manufacturing process starts, the straightening process must be set up and the optimal roller positions must be found. Once the process is set up, the roller position settings are usually not changed. Due to missing measurement systems for the straightening quality, it is not possible to dynamically adjust the positions of the straightening rollers to variations in the material properties. This leads to deviations in the dimensional accuracy of the components to be produced and thus to an increase in the rejection rate in the manufacturing processes. To reduce the rejection rate, a novel control system for a continuous feedback control of a straightening process is presented in this paper. This leads to a reduction of the rejection rate and unnecessary preforming operations in wire straightening process. The result is an increasing sustainability and efficiency of these production process.","lang":"eng"}],"user_id":"41470","department":[{"_id":"241"},{"_id":"153"}],"_id":"57174","language":[{"iso":"eng"}],"publication_status":"published","quality_controlled":"1","publication_identifier":{"issn":["2474-395X"]},"citation":{"apa":"Bathelt, L., Djakow, E., Henke, C., &#38; Trächtler, A. (2024). Innovative control system for straightening machines using sensor information from downstream processes. <i>Materials Research Proceedings</i>, <i>41</i>. <a href=\"https://doi.org/10.21741/9781644903131-308\">https://doi.org/10.21741/9781644903131-308</a>","bibtex":"@inproceedings{Bathelt_Djakow_Henke_Trächtler_2024, title={Innovative control system for straightening machines using sensor information from downstream processes}, volume={41}, DOI={<a href=\"https://doi.org/10.21741/9781644903131-308\">10.21741/9781644903131-308</a>}, booktitle={Materials Research Proceedings}, publisher={Materials Research Forum LLC}, author={Bathelt, Lukas and Djakow, Eugen and Henke, Christian and Trächtler, Ansgar}, year={2024} }","short":"L. Bathelt, E. Djakow, C. Henke, A. Trächtler, in: Materials Research Proceedings, Materials Research Forum LLC, 2024.","mla":"Bathelt, Lukas, et al. “Innovative Control System for Straightening Machines Using Sensor Information from Downstream Processes.” <i>Materials Research Proceedings</i>, vol. 41, Materials Research Forum LLC, 2024, doi:<a href=\"https://doi.org/10.21741/9781644903131-308\">10.21741/9781644903131-308</a>.","ama":"Bathelt L, Djakow E, Henke C, Trächtler A. Innovative control system for straightening machines using sensor information from downstream processes. In: <i>Materials Research Proceedings</i>. Vol 41. Materials Research Forum LLC; 2024. doi:<a href=\"https://doi.org/10.21741/9781644903131-308\">10.21741/9781644903131-308</a>","ieee":"L. Bathelt, E. Djakow, C. Henke, and A. Trächtler, “Innovative control system for straightening machines using sensor information from downstream processes,” in <i>Materials Research Proceedings</i>, 2024, vol. 41, doi: <a href=\"https://doi.org/10.21741/9781644903131-308\">10.21741/9781644903131-308</a>.","chicago":"Bathelt, Lukas, Eugen Djakow, Christian Henke, and Ansgar Trächtler. “Innovative Control System for Straightening Machines Using Sensor Information from Downstream Processes.” In <i>Materials Research Proceedings</i>, Vol. 41. Materials Research Forum LLC, 2024. <a href=\"https://doi.org/10.21741/9781644903131-308\">https://doi.org/10.21741/9781644903131-308</a>."},"intvolume":"        41","year":"2024","date_created":"2024-11-18T10:08:22Z","author":[{"first_name":"Lukas","full_name":"Bathelt, Lukas","last_name":"Bathelt"},{"first_name":"Eugen","last_name":"Djakow","id":"7904","full_name":"Djakow, Eugen"},{"last_name":"Henke","full_name":"Henke, Christian","first_name":"Christian"},{"last_name":"Trächtler","id":"552","full_name":"Trächtler, Ansgar","first_name":"Ansgar"}],"volume":41,"date_updated":"2024-11-18T10:42:37Z","publisher":"Materials Research Forum LLC","doi":"10.21741/9781644903131-308","title":"Innovative control system for straightening machines using sensor information from downstream processes"}]