3D Microstructural Finite Element Simulation of Martensitic Transformation of TRIP Steels

Abstract In this paper the effects of deformation modes on martensitic transformation for TRIP steels which are composed of Ferrite, Bainite and Retained austenite are investigated in the view of the microstructural level. For this porpose the simulations are run for a synthetically generated microstructure which have 55% Ferrit, 35% Bainite and 10% Retained austenite. In the simulations tensile, biaxial and shear type deformation modes are considered. The results reveal that biaxially loaded microstructure has the maximum amounts of martensite phases at the end of the given deformation and the less martensite is occurred in the shear type loading condition.

摘要 本文从微观结构层面，针对由铁素体（Ferrite）、贝氏体（Bainite）和残余奥氏体（Retained austenite）组成的TRIP钢的变形模式对马氏体相变（martensitic transformation）的影响展开研究。为此，针对由55%铁素体、35%贝氏体和10%残余奥氏体合成生成的微观结构开展了模拟仿真。本次仿真中考虑了拉伸、双轴以及剪切三种变形模式。研究结果表明，在给定变形过程结束时，受双轴加载的微观结构中马氏体相的占比最高，而剪切加载工况下生成的马氏体含量最低。