Thermodynamic principles for phase-field modeling of alloy solidification

被引:11
|
作者
Wang, Haifeng [1 ]
Zhang, Xiao [1 ]
Lai, Cun [1 ]
Kuang, Wangwang [1 ]
Liu, Feng [1 ]
机构
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
关键词
ENTROPY PRODUCTION PRINCIPLE; FINITE INTERFACE DISSIPATION; RAPID SOLIDIFICATION; MICROSTRUCTURE EVOLUTION; BINARY-ALLOYS; TRANSITIONS; PHYSICS; ENERGY;
D O I
10.1016/j.coche.2014.09.004
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Phase-field modeling is not only a powerful simulation tool to predict the microstructure evolution but also a useful theoretical method to study the interface kinetics. In this paper, the thermodynamic principles for and the recent progress in the phase-field modeling of isothermal solidification of binary alloys are reviewed. Different phase-field models with or without the condition of equal concentrations or equal diffusion potentials are reformulated from the entropy/free energy functional or the thermodynamic extremal principle. Their physics behind, problems and relation to the sharp interface models are analyzed. The importance to solve directly the additional constraints in the modeling system self-consistently in thermodynamics is highlighted.
引用
收藏
页码:6 / 15
页数:10
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