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Virtual testing of dual-phase steels: Effect of martensite morphology on plastic flow behavior

: Pagenkopf, J.; Butz, A.; Wenk, M.; Helm, D.

Preprint urn:nbn:de:0011-n-4216692 (5.8 MByte PDF)
MD5 Fingerprint: 9eb8f40de0b37e184efc347fd42305f8
Erstellt am: 29.07.2018

Materials Science and Engineering, A. Structural materials, properties, microstructure and processing 674 (2016), S.672-686
ISSN: 0921-5093
ISSN: 1873-4936
Deutsche Forschungsgemeinschaft DFG
RTG 1483;
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IWM ()

Dual-phase steels exhibit a moderate plastic anisotropy as a result of the underlying microstructure. A numerical homogenization scheme based on full-field finite element simulations was applied to assess the effect of the martensite morphology on the stress-strain curves and the plastic strain ratios (r-values) of a dual-phase steel under uniaxial tensile loading in different directions. The simulation results show that the martensite morphology affects the macroscopic response and the degree of plastic anisotropy. The mechanical behavior of the dual-phase steel (DP600) investigated in this work could be predicted if the crystallographic texture of the material and a statistically equivalent martensite morphology were considered in the simulations. The corresponding finite element models of the dual-phase microstructure were generated using a reconstruction procedure based on statistical correlation functions.