Numerical simulation of morphology and microsegregation evolution during solidification of Al-Si alloy

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	Numerical simulation of morphology and microsegregation evolution during solidification of Al-Si alloy
	D. Y. Guo; Y. S. Yang; W. H. Tong; Z. Q. Hu
	2004
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	20 期号:1 页码:19-23
摘要	A stochastic model coupled with transient calculations for the distributions of temperature, solute and velocity during the solidification of binary alloy is presented. The model can directly describe the evolution of both morphology and segregation during dendritic crystal growth. The model takes into account the curvature and growth anisotropy of dendritic crystals. Finite difference method is used to explicitly track the sharp solid liquid (S/L) interface on a fixed Cartesian grid. Two-dimensional mesoscopic calculations are performed to simulate the evolution of columnar and equiaxed dendritic morphologies of an Al-7 wt pct Si alloy. The effects of heat transfer coefficient on the evolution of both the dendrite morphology and segregation patterns during the solidification of binary alloys are analyzed. This model is applied to the solidification of small casting. Columnar-to-equiaxed transition is analyzed in detail. The effects of heat transfer coefficient on final casting structures are also studied. Final casting structures changing from wholly columnar dendrites to wholly equiaxed dendrites are described. The effect of melt flow on the morphological development during Al-7 wt pct Si alloy soilidification is also described.
部门归属	chinese acad sci, inst met res, shenyang 110016, peoples r china.;yang, ys (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;ysyang@imr.ac.cn
关键词	Stochastic Modeling Solidification Dendritic Microstructure Microsegregation Castings
URL	查看原文
WOS记录号	WOS:000220573700006
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35363
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. Y. Guo,Y. S. Yang,W. H. Tong,et al. Numerical simulation of morphology and microsegregation evolution during solidification of Al-Si alloy[J]. Journal of Materials Science & Technology,2004,20(1):19-23.
APA	D. Y. Guo,Y. S. Yang,W. H. Tong,&Z. Q. Hu.(2004).Numerical simulation of morphology and microsegregation evolution during solidification of Al-Si alloy.Journal of Materials Science & Technology,20(1),19-23.
MLA	D. Y. Guo,et al."Numerical simulation of morphology and microsegregation evolution during solidification of Al-Si alloy".Journal of Materials Science & Technology 20.1(2004):19-23.