Abstract

A finite deformation mean-field homogenization approach is proposed based on an extended Mori-Tanaka scheme that incorporates additional eigenvelocity gradients associated with microstructural changes in austenitic steels such as twinning or solid-solid phase transformation. The deformation of the individual phases is described by a finite strain, hyperelastic and single crystal plasticity model, which is fully anisotropic and captures strong mutual interactions of individual slip systems. The resulting mean-field model is employed in the simulation of homogeneous deformation states with a prescribed microstructure evolution at the material point level, where a strong interaction between phase transformation and plasticity is observed in the individual phases.