Three-dimensional phase-field simulations of coarsening kinetics of γ′ particles in binary Ni-Al alloys

被引：189
|
作者：
Zhu, JZ
Wang, T
Ardell, AJ
Zhou, SH
Liu, ZK
Chen, LQ
机构：
[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[2] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
来源：
ACTA MATERIALIA | 2004年 / 52卷 / 09期
基金：
美国国家航空航天局;
关键词：
phase-field model; Ni-base alloys; coarsening; kinetics; thermodynamics;
D O I：
10.1016/j.actamat.2004.02.032
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The coarsening kinetics of gamma' precipitates in binary Ni-Al alloy is studied using three-dimensional (3D) phase-field simulations. The bulk thermodynamic information and atomic diffusion mobilities are obtained from databases constructed using the CALP-HAD approach, while the experimental values for the interfacial energy, elastic constants and lattice mismatch are directly employed in the phase-field model. Specifically, we predict the morphological evolution, average precipitate size, and size distribution as a function of time for a given temperature and composition. Comparison of the phase-field simulation results with experiments shows Good quantitative agreement in both time and length scales. (C) 2004 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
引用
收藏
页码：2837 / 2845
页数：9
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