期刊
JOURNAL OF CRYSTAL GROWTH
卷 322, 期 1, 页码 84-90出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2011.03.026
关键词
Dendrites; Growth from melt; Mg-Sn alloy
资金
- National Natural Science Foundation of China [50974114]
The solidified microstructures in Mg-3Sn and Mg-5Sn (wt%) alloys were investigated experimentally. For Mg-3Sn, secondary and ternary dendrite arms grow rapidly from alpha-Mg equiaxed dendrites in a certain direction. When Sn content is increased to 5%, developed secondary and ternary dendrite arms in the upstream direction in the center of the sample do not occur. Formation of this microstructure characteristic was discussed in terms of cooling rate, force caused by fluid flow, and dendrite growth behavior of Mg-Sn alloy. The model for growth restriction factor (GRF) has been further discussed by considering the growth behavior of a dendrite tip, which reveals the relationship between GRF and dendrite growth rate. The relationship between GRF and constitutional undercooling was discussed during dendrite growth. The deviation of growth direction from <1 0 <(1)over bar> 0> crystal direction has been analyzed by fluid flow during solidification. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据