A micromechanical approach is presented to describe the transformation from austenite into martensite in multiphase steels. The strain-induced transformation model is based on evolving shear band intersections in austenite grains, which are estimated by a crystal plasticity model for the austenite deformation. The transformation model is applied to a representative volume element, in which the resulting internal stresses due to the transformation are calculated. The transformation model paves the way for a multiscale approach to accurately describe the deformation of multiphase steels including the microstructural level.
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