Finite Element Simulation of Strain-induced Martensitic Transformation Process in TRIP Steel based on Crystal Plasticity

Abstract

At present, there are a lot of research works evaluating the deformation behavior of metallic materials by crystal plasticity theory in order to account for their microscopic deformation behavior in crystal level. Of course, the influence of martensitic transformation on TRIP steel must be taken into account because martensite is formed with the specific crystal orientation relationship between parent phase and martensite. Moreover, the martensitic transformation affects greatly the mechanical properties of TRIP steel. Here, the coupled effects of slip systems and variant systems on the martensitic transformation process and the mechanical properties of TRIP steel are investigated. Therefore, the constitutive equation for single crystal is derived by including the influence of the martensitic transformation into the usual crystal plasticity theory Then, the deformation behavior under plane strain condition is simulated by FEM.