Effect of thermal convection on columnar-to-equiaxed transition during solidification of Al-Cu alloy

被引：0
|
作者：
Xian-fei Zhang
Zhi-jun Feng
Yu-fei Li
Zhong-xing Zhao
机构：
[1] Shenyang Ligong University,School of Materials Science and Engineering
[2] Shenyang Research Institute of Foundry Co.,undefined
[3] Ltd.,undefined
来源：
China Foundry | 2018年 / 15卷
关键词：
columnar-to-equiaxed transition; Al-Cu alloy; simulation; convection; TG146.21;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
To investigate the effect of three-dimension (3D) thermal convection on columnar-to-equiaxed transition (CET), the CET transition during the solidification of an Al-Cu alloy was simulated by 3D cellular automaton model coupled with the finite element method (CAFE). The thermal convection in the liquid phase was considered. The results show that the thermal convection in the liquid phase promotes the CET. When the convection is present, the temperature gradient at the start position of CET increases and the growth velocity of columnar dendrite decreases. The convection influences the formation of elongated equiaxed grain through changing the local temperature gradient and dendritic growth velocity.
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页码：358 / 362
页数：4
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