基于晶体相场模型二元合金凝固过程的晶粒形貌模拟  

Simulation of Grain Morphologies of Binary Alloy During Solidification Based on Phase Field Model

作　　者：朱兰芝 杨文娟[2] 

机构地区：[1]石家庄市职工大学基础部,河北石家庄050000 [2]石家庄信息工程职业学院,河北石家庄050000

出　　处：《铸造技术》2015年第2期293-295,共3页Foundry Technology

基　　金：河北省科技厅2012年度科学技术研究与发展第二批指导计划资助项目(12140225b)

摘　　要：基于相场模型研究了二元合金在不同过冷速率下的晶粒形貌演化。结果表明,形核数量随着冷却速率的提高而不断提高,晶粒尺寸随着冷却速率的增加而降低。当冷却速率达到某个极限值时,晶界迁移速率明显变慢,凝固组织粗化现象受到抑制。The evolution of the grain morphologies of binary alloy under different cooling rate was investigated based on the phase field model. The results show that the nucleation number increases with the increase of the cooling rate, while the grain size decreases. The migration rate of the grain boundary is quite slow when the cooling rate reaches a certain limit, and the coarsening phenomenon of solidified structure is restrained.

关 键 词：晶体相场 耦合 晶粒浓度演化 冷却速度 

分 类 号：TG244[金属学及工艺—铸造]