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.
出处
《铸造技术》
CAS
北大核心
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)
关键词
晶体相场
耦合
晶粒浓度演化
冷却速度
crystal phase field
coupling
evolution of grain concentration
cooling rate
