侯华, 赵宇宏, 徐宏, et al. 合金沉淀相微观组织演化计算机模拟[J]. 2003, (4).
DOI:
侯华, 赵宇宏, 徐宏, et al. 合金沉淀相微观组织演化计算机模拟[J]. 2003, (4).DOI:
合金沉淀相微观组织演化计算机模拟
摘要
利用微观扩散方程
结合微观弹性力学理论的方法
以25%(溶质原子百分数)的二元模型合金为例
研究了共格畸变对合金沉淀相微观组织形貌的影响.计算机模拟表明:当忽略弹性应变能时
沉淀为随机分布的等轴颗粒
呈各向同性特征;当考虑弹性应变能时
沉淀相趋于沿弹性"软"方向排列
呈各向异性特征.沉淀相沿最优方向长大和粗化.
Abstract
The microscopic diffusion equation combined with the theory of microscopic elasticity was used. The elastic straininduced morphological transformation of a binary model alloy containing 25% (percentage of solute atoms) was simulated. The results show: when the elastic strain energy was neglected
randomly distributed equiaxed particles were obtained with isotropic characteristic; when the elastic strain was considered
precipitates tend to aligned along the elastic \!soft\" directions with anisotropic characteristic. The selectively growth and coarsen of precipitates occur along the optimum directions.