Effect of Zr on solidification segregation behavior of K417G alloy and its anomalous effect during rapid cooling process

doi:10.1016/j.jallcom.2020.155243

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of Zr on solidification segregation behavior of K417G alloy and its anomalous effect during rapid cooling process
	Qi, Feng 2,3; Yu, Lianxu 4; Zhao, Guangdi 1; Xin, Xin 3; Zhang, Bin 2; Sun, Wenru 3
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2020-09-15
卷号	835 页码:9
关键词	Zirconium Solidification (gamma plus gamma ') eutectic K417G
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2020.155243
通讯作者	Sun, Wenru(wrsun@imr.ac.cn)
英文摘要	Although Zr is classified as a beneficial element in superalloys, it noticeably increases the solidification segregation, worsens the as cast microstructure and lowers the melting point of the superalloys, but the detailed information about the behavior of Zr during the solidification remains unknown till now. In this paper, some evidences supporting the assumption that a film of Zr formed at the solid/liquid interface during solidification have been found, including the precipitation of ZrC, Zr-2 (SC) and Ni-Zr phases at the grain boundary or eutectic (gamma+ gamma') front, and the concentration of Zr at the crack surface formed at the final stage of the K417G alloy solidification. The Zr-rich film at the solid/liquid interface markedly lowers the solidification rate of K417G alloy, and decreases the content of Al, Ti, Cr and Mo in the dendrite core. As a result, the precipitation of (gamma+ gamma') eutectic is largely increased. Under water quenching conditions, the solidification of the final liquids contains two sequential eutectic reaction, including the (gamma+ gamma') at the external part of the liquid pool and the (gamma + carbide) reaction at the central part of the liquid pool. Zr inhibits the second reaction and increases the crack formation tendency, implying that it would damage the weldability of the alloy. (C) 2020 Elsevier B.V. All rights reserved.
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000546685800022
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139793]
专题	金属研究所_中国科学院金属研究所
通讯作者	Sun, Wenru
作者单位	1.Univ Sci & Technol Liaoning, Sch Met & Mat, Anshan 114051, Peoples R China 2.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Chongqing Skyrizon Aeroengines Co Ltd, Tech Ctr, Chongqing 401135, Peoples R China
推荐引用方式 GB/T 7714	Qi, Feng,Yu, Lianxu,Zhao, Guangdi,et al. Effect of Zr on solidification segregation behavior of K417G alloy and its anomalous effect during rapid cooling process[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,835:9.
APA	Qi, Feng,Yu, Lianxu,Zhao, Guangdi,Xin, Xin,Zhang, Bin,&Sun, Wenru.(2020).Effect of Zr on solidification segregation behavior of K417G alloy and its anomalous effect during rapid cooling process.JOURNAL OF ALLOYS AND COMPOUNDS,835,9.
MLA	Qi, Feng,et al."Effect of Zr on solidification segregation behavior of K417G alloy and its anomalous effect during rapid cooling process".JOURNAL OF ALLOYS AND COMPOUNDS 835(2020):9.