【摘要】 利用包含共格畸变能的微观扩散方程对立方合金的沉淀过程进行计算机模拟。结果表明:共格畸变阻碍了过渡区合金沉淀过程的进行,随共格畸变能的增大,沉淀相分布的取向性越来越明显,由原来离散分布的等轴粒子状向椭片状转变。靠近高浓度合金的过渡区合金,随共格畸变能的增大,其沉淀机制由非经典形核长大和失稳分解的混合特征逐渐向非经典形核长大型的沉淀特征转变。更多还原

【Abstract】 The precipitation process simulation of the medial density cubic alloy was conducted using the microscopic diffusion equation including the coherent strain energy. The results show that the coherent strain energy hinder the precipitation process of the alloy. With the increase of coherent strain energy, the arrangement orientation increase, from spherical-shaped precipitates to elliptical plate. With the increase of coherent strain energy, the precipitation mechanism of medial composition alloys near the high density alloys are changing from the mixture processes which possessed the characteristics of both non-classical nucleation growth and spinodal decomposition mechanisms to the processes which possessed only the characteristics of non-classical nucleation growth.更多还原