Formation of the solidified microstructure of Mg-Al-Zn alloy under a low-voltage pulsed magnetic field

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	Formation of the solidified microstructure of Mg-Al-Zn alloy under a low-voltage pulsed magnetic field
	J. W. Fu ; Y. S. Yang
刊名	Journal of Materials Research
	2011
卷号	26 期号:14 页码:1688-1695
关键词	electric-current pulse austenitic stainless-steel directional solidification pure aluminum morphological instability structure refinement dendritic growth grain-refinement binary alloy stability
ISSN号	0884-2914
中文摘要	Effect of a low-voltage pulsed magnetic field (LVPMF) on the solidified microstructure of Mg-Al-Zn alloy has been investigated. Experimental results show that the solidified structure of Mg-Al-Zn alloy can be remarkably refined and that the morphology of alpha-Mg is transformed from developed dendrite to fine rosette with the application of LVPMF. Magnetization of the solute and solvent in the diffusion layer cannot account for the formation of the rosette alpha-Mg under LVPMF. A model for the formation of rosette alpha-Mg under LVPMF has been developed by analyzing the growth behavior of alpha-Mg dendrite. Morphology change of alpha-Mg dendrite under LVPMF is caused by Joule heat concentrated on the dendrite tip. Accumulation of Joule heat on the dendrite tip melts the local dendrite tip and increases the radius of curvature. The increased radius of curvature at the dendrite tip lowers the growth rate and results in the formation of rosette alpha-Mg.
原文出处	://WOS:000296079400005
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/30333]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	J. W. Fu,Y. S. Yang. Formation of the solidified microstructure of Mg-Al-Zn alloy under a low-voltage pulsed magnetic field[J]. Journal of Materials Research,2011,26(14):1688-1695.
APA	J. W. Fu,&Y. S. Yang.(2011).Formation of the solidified microstructure of Mg-Al-Zn alloy under a low-voltage pulsed magnetic field.Journal of Materials Research,26(14),1688-1695.
MLA	J. W. Fu,et al."Formation of the solidified microstructure of Mg-Al-Zn alloy under a low-voltage pulsed magnetic field".Journal of Materials Research 26.14(2011):1688-1695.