Solidification Characteristic and Segregation Behavior of a New Nickel Base K4750 Alloy

IMR OpenIR

	Solidification Characteristic and Segregation Behavior of a New Nickel Base K4750 Alloy
	Yu Xun 1,2; Wang Linlin 2; Ou Meiqiong 1; Ma Yingche 1; Xin Qibin 2; Liu Kui 1
通讯作者	Ma Yingche(ycma@imr.ac.cn)
	2019-05-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	48 期号:5 页码:1488-1496
摘要	The solidification microstructures and elemental microsegregation behavior of a new Ni-base superalloy K4750 was comparatively investigated by differential thermal analysis (DTA), Thermo-Calc calculation and isothermal solidification quenching (ISQ) experiment. The results of ISQ indicate that the temperature of liquidus and solidus of K4750 alloy are 1350 degrees C and 1270 degrees C, respectively, and the precipitated temperature of MC carbide is 1320 degrees C. The temperature of liquidus obtained by DTA and Thermal-Calc is in close agreement with the result of ISQ, but the temperature of solidus obtained by DTA and Thermal-Calc are 1306 C and 1296 C, respectively. In the initial stage of the solidification process, the volume fraction of residual liquid decreases sharply. In solidification process within the temperature range of 1310 degrees C similar to 1290 degrees C, the residual liquid in the interdendritic region transforms from connected channels to isolated micro-liquid pools. In the last stage of solidification, these isolated micro-liquid pools are quite sluggish and result in the formation of porosity. The microsegregation coefficients of W, Fe and Cr are larger than 1, so they are considered to be negative segregation elements and segregate in solid. In contrast, the microsegregation coefficients of Ti, Nb, C and Mo are less than 1, and thus they are positive segregation elements and segregated in the liquid.
关键词	element segregation Thermal-Calc calculation Ni-based superalloy
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000470794300019
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计	被引频次：2[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/321006/133989
专题	中国科学院金属研究所
通讯作者	Ma Yingche
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Northeastern Univ, Shenyang 110819, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Yu Xun,Wang Linlin,Ou Meiqiong,et al. Solidification Characteristic and Segregation Behavior of a New Nickel Base K4750 Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(5):1488-1496.
APA	Yu Xun,Wang Linlin,Ou Meiqiong,Ma Yingche,Xin Qibin,&Liu Kui.(2019).Solidification Characteristic and Segregation Behavior of a New Nickel Base K4750 Alloy.RARE METAL MATERIALS AND ENGINEERING,48(5),1488-1496.
MLA	Yu Xun,et al."Solidification Characteristic and Segregation Behavior of a New Nickel Base K4750 Alloy".RARE METAL MATERIALS AND ENGINEERING 48.5(2019):1488-1496.