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Micro-magnetic damage characterization of bent and cold forged parts

  • Lisa Samfaß
  • Nikolas BaakEmail author
  • Rickmer Meya
  • Oliver Hering
  • A. Erman Tekkaya
  • Frank Walther
Quality Assurance
  • 43 Downloads

Abstract

Damage can have a strong impact on the fatigue performance of bulk formed parts for example produced by cold forging and sheet metal formed parts for example produced by bending. One suitable method to detect damage non-destructively in a time-efficient way is the micro-magnetic material characterization. In this paper, the suitability of harmonic analysis of the tangential magnetic field strength for the detection of damage in bent DP800-parts and cold forged 16MnCrS5-parts is discussed. For differently formed parts a correlation between the magnitude of damage and the behavior of the upper harmonics parameters is shown.

Keywords

Damage characterization Micro-magnetic Upper harmonics Bending Cold forging 

Notes

Acknowledgements

The authors gratefully acknowledge the funding by the German Research Foundation (DFG) for the subprojects A02, A05 and B01 within the Collaborative Research Center CRC/Transregio 188 “Damage Controlled Forming Processes” (Project number: 278868966).

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Copyright information

© German Academic Society for Production Engineering (WGP) 2019

Authors and Affiliations

  1. 1.Fachgebiet Werkstoffprüftechnik (WPT)TU DortmundDortmundGermany
  2. 2.Institut für Umformtechnik und Leichtbau (IUL)TU DortmundDortmundGermany

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