Grain refinement effect of a pulsed magnetic field on as-cast superalloy K417

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	Grain refinement effect of a pulsed magnetic field on as-cast superalloy K417
	X. P. Ma; Y. J. Li; Y. S. Yang
	2009
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	24 期号:8 页码:2670-2676
摘要	The grain refinement effect of a pulsed magnetic field on superalloy K417 was studied. The experimental results show that fine equiaxed grains are acquired with proper thermal control under the pulsed magnetic field. The refinement effect of the pulsed magnetic field is affected by the melt cooling rate and the melt superheating. The refinement effect of the pulsed magnetic field is attributed to the dissociation of nuclei from the mold wall by melt vibration and the subsequent dispersion of nuclei by melt convection. The Joule heat and the melt convection caused by the pulsed magnetic field may defer the formation of solidified shell, which prolongs the continuous refinement process. The decrease of melt cooling rate reduces the number of nuclei produced on the mold wall but prolongs the duration for the nuclei to depart from the mold wall and disperse in the melt, which enhances the refinement effect of the pulsed magnetic field. The increase of melt superheating lessens the survival probability of the nuclei in the melt, which weakens the refinement effect of the pulsed magnetic field.
部门归属	[ma, xiaoping; li, yingju; yang, yuansheng] 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	Electromagnetic Vibrations Microstructural Refinement Stainless-steel Alloys Metals Al
URL	查看原文
WOS记录号	WOS:000268829300027
引用统计	被引频次：34[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/321006/32189
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. P. Ma,Y. J. Li,Y. S. Yang. Grain refinement effect of a pulsed magnetic field on as-cast superalloy K417[J]. Journal of Materials Research,2009,24(8):2670-2676.
APA	X. P. Ma,Y. J. Li,&Y. S. Yang.(2009).Grain refinement effect of a pulsed magnetic field on as-cast superalloy K417.Journal of Materials Research,24(8),2670-2676.
MLA	X. P. Ma,et al."Grain refinement effect of a pulsed magnetic field on as-cast superalloy K417".Journal of Materials Research 24.8(2009):2670-2676.