Grain refinement of as cast superalloy K4169 solidified with low voltage pulsed magnetic field

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	Grain refinement of as cast superalloy K4169 solidified with low voltage pulsed magnetic field
	Y. F.; Feng Teng, X. H.; Li, Y. J.; Yang, Y. S.
	2014
发表期刊	Materials Research Innovations
ISSN	1432-8917
卷号	18 页码:352-356
摘要	The solidification behaviour and the as cast structure of superalloy K4169 ingots solidified with a low voltage pulsed magnetic field (LVPMF) were investigated by experiments and modelling. The experimental results showed that complete fine equiaxed grains in ingots of diameter 95 mm were obtained by applying an LVPMF. Dendrite tips in the as cast structure were rounded due to the release of latent heat and the concentration of the Joule heating effect on the dendrite tips. The solidification procedure was simulated in order to investigate the grain refinement mechanism. The simulation results show that the LVPMF has electromagnetic convection and electromagnetic vibration effects on the alloy melt. Grain refinement was considered as the result of the magnetic force and melt flow during solidification. Based on the experimental and simulation results, a refining mechanism was proposed for nucleus multiplication by melt vibration and convection, which contributes to heterogeneous nucleation enhancement and leads to high nucleation rate and grain refinement.
部门归属	[teng, y. f. ; feng, x. h. ; li, y. j. ; yang, y. s.] 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	Grain Refinement Superalloy Pulsed Magnetic Field Solidification Magnesium Alloy In718 Al
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73932
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. F.,Feng Teng, X. H.,Li, Y. J.,et al. Grain refinement of as cast superalloy K4169 solidified with low voltage pulsed magnetic field[J]. Materials Research Innovations,2014,18:352-356.
APA	Y. F.,Feng Teng, X. H.,Li, Y. J.,&Yang, Y. S..(2014).Grain refinement of as cast superalloy K4169 solidified with low voltage pulsed magnetic field.Materials Research Innovations,18,352-356.
MLA	Y. F.,et al."Grain refinement of as cast superalloy K4169 solidified with low voltage pulsed magnetic field".Materials Research Innovations 18(2014):352-356.