Simulation of electromagnetic-flow fields in Mg melt under pulsed magnetic field

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	Simulation of electromagnetic-flow fields in Mg melt under pulsed magnetic field
	B. Wang; Y. S. Yang; X. P. Ma; W. H. Tong
	2010
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	20 期号:2 页码:283-288
摘要	The effects of a pulsed magnetic field on the solidified microstructure of pure Mg were investigated. The results show that microstructure of pure Mg is considerably refined via columnar-to-equiaxed growth under the pulsed magnetic field and the average grain size is refined to 260 mu m under the optimal processing conditions. A mathematical model was built to describe the interaction of the electromagnetic-flow fields during solidification with ANSYS software. The pulsed electric circuit was first solved and then it is substituted into the magnetic field model. The fluid flow model was solved with the acquired electromagnetic force. The effects of pulse voltage frequency on the current wave and on the distribution of magnetic and flow fields were numerically studied. The pulsed magnetic field increases melt convection, which stirs and fractures the dendritic arms into pieces. These broken pieces are transported into the bulk liquid by the liquid flow and act as nuclei to enhance grain refinement. The Joule heat effect produced by the electric current also participates in the microstructural refinement.
部门归属	[wang bin; yang yuan-sheng; ma xiao-ping; tong wen-hui] 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	Pulsed Magnetic Field Numerical Simulation Pure Mg Microstructure Refinement Structure Refinement Pure Aluminum Alloy Microstructure Solidification Al Vibrations Magnesium Az91d
URL	查看原文
WOS记录号	WOS:000277514800020
引用统计	被引频次：20[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/321006/31488
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	B. Wang,Y. S. Yang,X. P. Ma,et al. Simulation of electromagnetic-flow fields in Mg melt under pulsed magnetic field[J]. Transactions of Nonferrous Metals Society of China,2010,20(2):283-288.
APA	B. Wang,Y. S. Yang,X. P. Ma,&W. H. Tong.(2010).Simulation of electromagnetic-flow fields in Mg melt under pulsed magnetic field.Transactions of Nonferrous Metals Society of China,20(2),283-288.
MLA	B. Wang,et al."Simulation of electromagnetic-flow fields in Mg melt under pulsed magnetic field".Transactions of Nonferrous Metals Society of China 20.2(2010):283-288.