Effect of Zr on solidification and microstructure of a Ni-based superalloy with high Al and Ti contents

doi:10.1007/s41230-022-1058-6

IMR OpenIR

	Effect of Zr on solidification and microstructure of a Ni-based superalloy with high Al and Ti contents
	Zhao, Guang-di 1; Zang, Xi-min 1; Liu, Fang 2; Zhang, Wei-wei 2; Gao, Shuo 1; Li, Xue 1; Guo, Jing 1
通讯作者	Zhao, Guang-di(gdzhao12s@alum.imr.ac.cn)
	2022-02-01
发表期刊	CHINA FOUNDRY
ISSN	1672-6421
页码	10
摘要	The total content of Al and Ti in advanced Ni-based wrought superalloys is up to 7.5wt.%, which makes it easier to form harmful nonequilibrium eutectic (gamma+gamma ') and eta phase. It has been reported that the addition of certain amount of Zr can modify precipitation of the nonequilibrium phases obviously, but the mechanism is still controversial. The effect of Zr ranging from <0.0006wt.% to 0.150wt.% on solidification behavior, segregation and microstructure of a Ni-based superalloy with high Al and Ti contents was investigated, eliminating the interferences of C and B. Results show that increase in Zr content significantly promotes the formation of eutectic (gamma+gamma '), eta and Zr-rich phase in the interdendritic region. Besides the Zr-rich phase, Zr dissolves slightly in the eutectic gamma ' and obviously in the eta phase. An interesting phenomenon is discovered that the Zr addition significantly increases the area fraction of liquid pools and enlarges the forming range of gamma dendrites, which suggests that Zr markedly retards the solidification. Zr affects the eutectic (gamma+gamma ') and eta formation mainly due to the retard of solidification and dissolution of Zr in them. The retard of solidification obviously increases the residual liquid fraction and undercooling. Zr can serve as a forming element for the eutectic (gamma+gamma ') and eta phase, and the obvious dissolution of Zr in eta phase significantly decreases the critical concentration of Ti for its precipitation.
关键词	zirconium Ni-based superalloy solidification behavior segregation TG132 3(+)3 A
资助者	National Natural Science Foundation of China
DOI	10.1007/s41230-022-1058-6
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51904146]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000750331700001
出版者	SPRINGER SINGAPORE PTE LTD
引用统计	被引频次：5[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/321006/173532
专题	中国科学院金属研究所
通讯作者	Zhao, Guang-di
作者单位	1.Univ Sci & Technol Liaoning, Sch Mat & Met, Anshan 114051, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Guang-di,Zang, Xi-min,Liu, Fang,et al. Effect of Zr on solidification and microstructure of a Ni-based superalloy with high Al and Ti contents[J]. CHINA FOUNDRY,2022:10.
APA	Zhao, Guang-di.,Zang, Xi-min.,Liu, Fang.,Zhang, Wei-wei.,Gao, Shuo.,...&Guo, Jing.(2022).Effect of Zr on solidification and microstructure of a Ni-based superalloy with high Al and Ti contents.CHINA FOUNDRY,10.
MLA	Zhao, Guang-di,et al."Effect of Zr on solidification and microstructure of a Ni-based superalloy with high Al and Ti contents".CHINA FOUNDRY (2022):10.