Journal
INTERNATIONAL JOURNAL OF PLASTICITY
Volume 27, Issue 7, Pages 1103-1125Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2010.12.001
Keywords
Dual phase (DP) steel; Failure mechanism; Crystal plasticity finite element method (CPFEM); Microstructural modeling
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Both experimental and numerical methods were employed to investigate the mechanism of failure in dual phase steels. The tensile test was interrupted in different steps to capture the mechanism of void initiation and void growth during material failure. The results can be considered as a first report for the commercial DP800 steel. Numerical simulations, which were carried out using the real micro-structure, are able to predict the void initiation in the material. In addition, through the numerical simulation a new understanding of the deformation localization was gained. Deformation localization, which causes severely deformed regions in the material, is most probably the main source of rupture in the final stages of the failure. In the SEM micrographs of the material after failure some voids are observable which can validate the results obtained by the simulation. (C) 2010 Elsevier Ltd. All rights reserved.
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