Three dimensional elasto-plastic phase field simulation of martensitic transformation in polycrystal
Three dimensional elasto-plastic phase field simulation of martensitic transformation in polycrystal
复制标题
DOI：
10.1016/j.msea.2012.06.080
复制
发表时间：
2012-10
期刊：
影响因子：
6.4
通讯作者：
A. Malik;Hemantha Kumar Yeddu;G. Amberg;A. Borgenstam;J. Ågren
中科院分区：
文献类型：
--
作者：
A. Malik;Hemantha Kumar Yeddu;G. Amberg;A. Borgenstam;J. Ågren
采用Khachaturyan提出的相场微弹性模型，用有限元法对多晶材料中的马氏体相变进行了三维模拟。利用塑性变形演化的时间相关方程研究了塑性调节效应。本文采用弹塑性相场法对多晶Fe-0.3%C合金的FCC→BCT马氏体相变进行了二维和三维的模拟。模拟结果表明，塑性调节的引入降低了母相中的应力强度，从而导致马氏体体积分数的增加。模拟结果还表明，自催化相变起始于晶界，并生长到母相。结果表明，该模型能较好地预测多晶体中的应力分布和微观结构的演化。
The Phase Field Microelasticity model proposed by Khachaturyan is used to perform 3D simulation of Martensitic Transformation in polycrystalline materials using finite element method. The effect of plastic accommodation is investigated by using a time dependent equation for evolution of plastic deformation. In this study, elasto-plastic phase field simulations are performed in 2D and 3D for different boundary conditions to simulate FCC→BCT martensitic transformation in polycrystalline Fe-0.3%C alloy. The simulation results depict that the introduction of plastic accommodation reduces the stress intensity in the parent phase and hence causes an increase in volume fraction of the martensite. Simulation results also show that autocatalistic transformation initiates at the grain boundaries and grow into the parent phase. It has been concluded that stress distribution and the evolution of microstructure can be predicted with the current model in a polycrystal.