Microscopic phase-field simulation of the early precipitation mechanism of Ni3Al phase in Ni-Al alloys

被引：18
|
作者：
Lu, Yan Li [1 ]
Chen, Zheng [1 ]
Wang, Yong Xin [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China
来源：
MATERIALS LETTERS | 2008年 / 62卷 / 8-9期
基金：
中国国家自然科学基金;
关键词：
precipitation mechanism; elastic strain; intermetallic alloys and compounds; computer simulation;
D O I：
10.1016/j.matlet.2007.08.061
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The precipitation mechanism and morphological evolution of Ni3Al phase is studied on the atomic scale with the microscopic phase-field simulation. The results show that the early precipitation mechanisms are different for the alloys with different Al content. The early precipitation mechanism of lower Al concentration alloy is the mechanism of non-classical nucleation growth, the medium Al concentration alloy is the mixed mechanism of non-classical nucleation growth and spinodal decomposition and the higher Al concentration alloy is the mechanism of congruent ordering followed by spinodal decomposition. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：1385 / 1388
页数：4
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