Phase field modeling for dendritic morphology transition and micro-segregation in multi-component alloys

被引：4
|
作者：
Wang JinCheng [1 ]
Zhang YuXiang [1 ]
Yang YuJuan [1 ]
Li JunJie [1 ]
Yang GenCang [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES | 2009年 / 52卷 / 02期
基金：
中国国家自然科学基金;
关键词：
multi-component alloys; phase field method; morphology transition; micro-segregation; SOLIDIFICATION; SIMULATION; GROWTH;
D O I：
10.1007/s11431-008-0155-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
By using the phase field model for the solidification of multi-component alloys and coupling with real thermodynamic data, the dendritic morphology transition and the dendritic micro-segregation of Ni-Al-Nb ternary alloys are simulated in two cases, i.e., varying the alloy composition at a fixed undercooling and varying the undercooling at a fixed alloy composition. The simulated results indicate that with the increase of the dimensionless undercooling U (U=Delta T/Delta T (0), where Delta T is the undercooling and Delta T (0) the temperature interval between the solidus and liquidus), the dendritic morphology transfers from dendritic to globular growth in both cases. As to the dendritic micro-segregation, both cases present a regularity of increasing at first and then decreasing.
引用
收藏
页码：344 / 351
页数：8
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