Microstructure refinement of AZ91D alloy solidified with pulsed magnetic field

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	Microstructure refinement of AZ91D alloy solidified with pulsed magnetic field
	B. Wang; Y. S. Yang; J. X. Zhou; W. H. Tong
	2008
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	18 期号:3 页码:536-540
摘要	The effects of pulsed magnetic field on the solidified microstructure of an AZ91D magnesium alloy were investigated. The experimental results show that the remarkable microstructural refinement is achieved when the pulsed magnetic field is applied in the solidification of AZ91D alloy. The average grain size of the as-cast microstructure of AZ91D alloy is refined to 104 Pin. Besides the grain refinement, the morphology of the primary alpha-Mg is changed from dendritic to rosette, then to globular shape with changing the parameters of the pulsed magnetic field. The pulsed magnetic field causes melt convection during solidification, which makes the temperature of the whole melt homogenized, and produces an undercooling zone in front of the liquid/solid interface by the magnetic pressure, which makes the nucleation rate increased and big dendrites prohibited. In addition, primary a-Mg dendrites break into fine crystals, resulting in a refined solidification structure of the AZ91D alloy. The Joule heat effect induced in the melt also strengthens the grain refinement effect and spheroidization of dendrite arms.
部门归属	[wang bin; yang yuan-sheng; zhou ji-xue; 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	Az91d Magnesium Alloy Grain Refinement Pulsed Magnetic Field Solidified Microstructure Forced Electromagnetic Vibrations Al-si Alloys Aluminum-alloys Magnesium
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WOS记录号	WOS:000256509200008
引用统计	被引频次：56[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/321006/33113
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,J. X. Zhou,et al. Microstructure refinement of AZ91D alloy solidified with pulsed magnetic field[J]. Transactions of Nonferrous Metals Society of China,2008,18(3):536-540.
APA	B. Wang,Y. S. Yang,J. X. Zhou,&W. H. Tong.(2008).Microstructure refinement of AZ91D alloy solidified with pulsed magnetic field.Transactions of Nonferrous Metals Society of China,18(3),536-540.
MLA	B. Wang,et al."Microstructure refinement of AZ91D alloy solidified with pulsed magnetic field".Transactions of Nonferrous Metals Society of China 18.3(2008):536-540.