Solidification Characteristics and Segregation Behavior of a Ni-Fe-Cr Based Alloy

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	Solidification Characteristics and Segregation Behavior of a Ni-Fe-Cr Based Alloy
	Wang Changshuai 1; Su Haijun 2; Guo Yongan 1; Guo Jianting 1; Zhou Lanzhang 1
刊名	RARE METAL MATERIALS AND ENGINEERING
	2018-12-01
卷号	47 期号:12 页码:3816-3823
关键词	Ni-Fe-Cr based alloy solidification microstructure solidification path solution distribution coefficient dendritic segregation
ISSN号	1002-185X
通讯作者	Wang Changshuai(cswang@imr.ac.cn)
英文摘要	The solidification characteristics and segregation behavior of a Ni-Fe-Cr based alloy with planar interface and dendritic growth, which was obtained through quenching experiments during directional solidification, were investigated. Results show that the major precipitates are gamma, gamma' and MC. The phase transition route is determined as follows: L -> L+gamma -> L+gamma MC ->gamma+gamma'+MC. The solution distribution coefficients of Ti, Nb and Mo are less than unity. The solution distribution coefficients of Fe is greater than unity, and Al and Cr are close to 1. The solute boundary layer forms ahead of the liquid/solid interface when the steady-state growth begins. The solute is carried away mainly by diffusion in the solute boundary layer, but carried away mainly by flow out of the solute boundary layer. The solute distribution in solid phase with dendritic growth is similar to that with planar interface growth. However, the solute concentration in the quenched liquid in the interdendritic area is obviously higher than that ahead of the liquid/solid interface. The solidification segregation of the mushy zone is more serious than that of the solid region. It indicates that the back-diffusion in solid phase and the precipitation of MC carbide would reduce the solidification segregation during the dendritic growth.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000455074500037
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/130939]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang Changshuai
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110006, Liaoning, Peoples R China 2.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang Changshuai,Su Haijun,Guo Yongan,et al. Solidification Characteristics and Segregation Behavior of a Ni-Fe-Cr Based Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2018,47(12):3816-3823.
APA	Wang Changshuai,Su Haijun,Guo Yongan,Guo Jianting,&Zhou Lanzhang.(2018).Solidification Characteristics and Segregation Behavior of a Ni-Fe-Cr Based Alloy.RARE METAL MATERIALS AND ENGINEERING,47(12),3816-3823.
MLA	Wang Changshuai,et al."Solidification Characteristics and Segregation Behavior of a Ni-Fe-Cr Based Alloy".RARE METAL MATERIALS AND ENGINEERING 47.12(2018):3816-3823.