应力场对相分解过程影响的计算机模拟研究(I)——模型描述及对称成分下的相分离模拟

Effect of Stress Field on Phase Separation Process by Computer Simulation (I): Model Description and Simulation of Symmetrical Composition Phase Separation Process

摘要:

将扩散界面场模型与Khachaturyan弹性应变能计算模型相耦合,对对称成分点调幅分解过程中应力场(包括外场)对析出相的形态及动力学过程的影响进行模拟研究。模拟结果表明:对于非均匀弹性模量系统在外加应力场作用下,沉淀相的析出过程发生重大的变化,粒子沿弹性软方向呈各向异性析出。

Abstract:

In this paper,Diffuse-interface field model and Khachaturyan elastic strain energy model are coupled to investigate the morphologyical evolutions and kinetics process controlled by transformation-induced elastic strain (include external strain field) during spinodal decomposition in a symmetrical composition case. The simulation results indicate that precipitates are preferentially oriented along elalstic soft directions with an external stress for an inhomogeneous elastic modulus system.