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18-11-2019 | Quality Assurance | Issue 1/2020

Production Engineering 1/2020

Micro-magnetic damage characterization of bent and cold forged parts

Journal:
Production Engineering > Issue 1/2020
Authors:
Lisa Samfaß, Nikolas Baak, Rickmer Meya, Oliver Hering, A. Erman Tekkaya, Frank Walther
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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.

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