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A micro mechanical study on failure initiation of dual phase steels under tension using single crystal plasticity model

: Kadkhodapour, J.; Butz, A.; Ziaei-Rad, S.; Schmauder, S.

Preprint urn:nbn:de:0011-n-1725281 (3.8 MByte PDF)
MD5 Fingerprint: d6731eb576ffa2b5d5b862f556e57e55
Erstellt am: 13.11.2013

International Journal of Plasticity 27 (2011), Nr.7, S.1103-1125
ISSN: 0749-6419
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IWM ()

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.