A review on numerical analyses of martensitic phase transition in mono and polycrystal transformation-induced plasticity steel by crystal plasticity finite element method with length scales

Abstract

Strain-induced martensitic transformation (SIMT) plays an essential role for enhancing the mechanical properties of TRIP steel such as high strength, ductility and toughness. Thus, the mechanical responses including the SIMT are significantly important for an engineering design of the materials with microstructural predictions. It is proven that length scales such as a grain size of the parent phase influence the deformation behavior of TRIP steel, and it is necessary to understand deeply the SIMT behavior considering with specific length scales. This review focuses on computational analyses of SIMT in both single crystal and polycrystal TRIP steel by the crystal plasticity finite element method (CPFEM) for predicting the SIMT behavior with the appropriate length scales such as grain size. Then, in order to discuss the size-dependency, examples of computational results under an assumption of plane strain tension with two planar slip systems are shown for both single crystal and polycrystal TRIP steel by the proposed framework of CPFEM in the past without any length scales.