Phase-field simulation of the elastic effect on the transformation kinetics in precipitation

被引：1
|
作者：
Zhang, Yuxiang [1 ]
Wang, Jincheng [1 ]
Yang, Yujuan [1 ]
Yang, Gencang [1 ]
Zhou, Yaohe [1 ]
机构：
[1] NW Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
MATERIALS TRANSACTIONS | 2008年 / 49卷 / 01期
关键词：
phase field; elastic field; transformation kinetics; precipitation;
D O I：
10.2320/matertrans.MRA2007153
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Phase-field simulations were performed to investigate the effect of elastic field on the transformation kinetics of precipitation for both the single- and the multi-particle systems with different alloy composition c(0) and lattice misfits in Ni-Al binary alloys. Simulated results indicate, for both the single- and the multi-particle systems, that there exists a critical value c(crit) for the alloy composition. When c(0) < c(crit), the elastic field delays the transformation, otherwise, accelerates the transformation. Increasing the lattice misfit accelerates the transformation when co > c(crit), but decelerates the transformation when c(0) < c(crit). The elastic field also has great effect on the peak value and its occurrence time of transformation rate, and their values are dependent on the alloy composition. The variety of the effect of elastic field on the transformation kinetics is determined by the competition between the self-elastic energy and the strain-induced interaction energy in different systems.
引用
收藏
页码：133 / 138
页数：6
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