Grundlagenuntersuchung zur ultraschallunterstützten Umformung metallischer Werkstoffe mittels Druck- und Scherbeanspruchung
Head
Researcher
Funding period:
Start: 1. March 2018
Ende: 30. November 2022
Abstract
One approach to extend the process limits in bulk forming is to superimpose a high-frequency oscillation on the tool movement. This so-called ultrasonic assistance (US) leads to an immediate reduction of the material's flow stress and therefore to decreased tool and workpiece loads. The research project is focused on the underlying mechanisms of the flow stress reduction and the effects on the material flow behavior. In oscillation superimposed shear tests, it was found that the cyclic loading and unloading promotes the crack initiation and thus leads to earlier material failure. Hence, the formability of the material C35E is reduced by the ultrasonic assistance.
Research groups
Publications
2023
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Mechanical joining of high-strength multi-material systems - trends and innovations
In: Mechanics & Industry 24 (2023), p. 1-20
ISSN: 2257-7777
DOI: 10.1051/meca/2023013
2022
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Ultrasonic-assisted forming - Influence of unavoidably induced tool oscillations
XL. Conference on Metal Forming (Zauchensee, 12. March 2022 - 15. March 2022) - , :
Residual effects of ultrasonic assistance in metal forming
1st International Conference on Engineering Manufacture 2022 (EM 2022) (Porto, 5. May 2022 - 6. May 2022) - , :
A novel ultrasonic-assisted staking process for mechanical fasteners
In: Proceedings of the Institution of Mechanical Engineers Part L-Journal of Materials-Design and Applications (2022)
ISSN: 1464-4207
DOI: 10.1177/14644207221079999
2021
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Investigation of a novel ultrasonic-assisted staking process for mechanical fasteners
2nd International Conference on Advanced Joining Processes AJP 2021 (Sintra, 21. October 2021 - 22. October 2021) - , :
Influence of Ultrasonic Assistance on the Forming Limits of Steel
13th International Conference on the Technology of Plasticity, ICTP 2021 (Virtual, Online, 25. July 2021 - 30. July 2021)
In: Glenn Daehn, Jian Cao, Brad Kinsey, Erman Tekkaya, Anupam Vivek, Yoshinori Yoshida (ed.): Minerals, Metals and Materials Series 2021
DOI: 10.1007/978-3-030-75381-8_106
2020
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Investigation of thermal effects during ultrasonic-assisted upsetting
In: Procedia Manufacturing 50 (2020), p. 220-225
ISSN: 2351-9789
DOI: 10.1016/j.promfg.2020.08.041
URL: https://www.sciencedirect.com/science/article/pii/S235197892031739X
2019
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Residual effects of ultrasonic-assisted compression testing on pure copper
22nd International ESAFORM Conference on Material Forming, ESAFORM 2019 (Vitoria-Gasteiz, 8. May 2019 - 10. May 2019)
In: Pedro Arrazola, Eneko Saenz de Argandona, Nagore Otegi, Joseba Mendiguren, Mikel Saez de Buruaga, Aitor Madariaga, Lander Galdos (ed.): AIP Conference Proceedings 2019
DOI: 10.1063/1.5112644
Deutsch