Abstract
Recent Bauschinger-type tests conducted on a twinning-induced plasticity (TWIP) steel highlights the important contribution of internal stresses to work hardening [1]. Along this line we present Bauschinger experiments in a Fe–22Mn wt%–0.6C wt% TWIP steel. The mechanical behavior upon load reversal shows transient and permanent softening effects. Determination of the internal stress from the magnitude of the permanent softening yields a contribution to work hardening of the order of 20%. Analysis of the transient softening, during strain reversal, indicates that internal stress is consistent with reported data on high carbon spheroidized steels.
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Acknowledgements
The authors would like to acknowledge the financial support by the German Research Foundation within the framework of the SFB 761 “steel ab initio” and the CICYT grant MAT2009-14452 awarded by the Spanish Ministry of Science and Innovation.
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Gutierrez-Urrutia, I., del Valle, J.A., Zaefferer, S. et al. Study of internal stresses in a TWIP steel analyzing transient and permanent softening during reverse shear tests. J Mater Sci 45, 6604–6610 (2010). https://doi.org/10.1007/s10853-010-4750-7
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DOI: https://doi.org/10.1007/s10853-010-4750-7