Phase-field Model for Spinodal Decomposition of Dilute Solute in Al-Ag Alloy

被引：0
作者：
Gao Yingjun [1 ]
Luo Zhirong [1 ]
机构：
[1] Guangxi Univ, Coll Phys, Nanning 530004, Peoples R China
来源：
ADVANCED MATERIALS, PTS 1-3 | 2012年 / 415-417卷
关键词：
Al-Ag alloy; spinodal decomposition; phase-field method; GRAIN-GROWTH; SIMULATION;
D O I：
10.4028/www.scientific.net/AMR.415-417.1168
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The typical Landau free energy functional with the fourth power of a solute composition field is not suitable for representing spinodal decomposition of a dilute Ag solute field in Al-Ag alloy. Facing this challenge, a new free energy density function is proposed for spinodal decomposition of a dilute Ag solute field of Al-Ag alloy. The evolution of the solute field in A1-4.2% Ag alloy is studied by phase-field method using this new function. The simulated results reveal that the precipitate free zone (PFZ) around the precipitated gamma phase is an ellipse and its width is about two times that of y phase, while in the region far from PFZ, a GPZ pattern of Ag solute field appears due to spinodal decomposition.
引用
收藏
页码：1168 / 1170
页数：3
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