Effect of Hf on microstructure and creep properties of a hot corrosion resistant nickel-based single crystal superalloy

doi:10.1007/s41230-025-4120-3

IMR OpenIR

	Effect of Hf on microstructure and creep properties of a hot corrosion resistant nickel-based single crystal superalloy
	Ma, Li 1,2; Wang, Dong 2; Zhang, Gong 2; Shen, Jian 2; Zhang, Jian 2
通讯作者	Wang, Dong(dwang@imr.ac.cn) ; Zhang, Jian(jianzhang@imr.ac.cn)
	2025-03-11
发表期刊	CHINA FOUNDRY
ISSN	1672-6421
页码	9
摘要	To investigate the microstructure and creep properties of a hot corrosion resistant Ni-based single crystal superalloy containing different hafnium (Hf) additions (0-0.4wt.%), creep test was performed at 980 degrees C/200 MPa. Optical microscopy, scanning electron microscopy, electron probe micro analysis (EPMA), and transmission electron microscopy were employed to analyze the microstructure differences. With the increase of Hf, the creep rupture life of the alloys at 980 degrees C/200 MPa gradually increases. Microstructure analysis reveals that Hf promotes the transformation of carbide morphology from script to rod-like and finally to blocky. Upon the addition of Hf, there is an increase in the volume fraction of blocky MC carbides, along with an elevation in the partitioning ratio of Cr and Mo elements. Concurrently, the gamma/gamma ' interfacial dislocation spacing undergoes a reduction. It is found that script carbides are more likely to cause stress concentration in high temperature creep, leading to nucleation and propagation of microcracks. The formation mechanism of blocky MC carbides is related to the increase in precipitation temperature and lattice constant, and its beneficial impact on creep resistance is also investigated based on the analysis of the creep test results.
关键词	Ni-based single crystal superalloys hafnium creep properties MC carbides hot corrosion resistance
资助者	National Key Research and Development Program of China ; National Science and Technology Major Project ; National Natural Science Foundation of China
DOI	10.1007/s41230-025-4120-3
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2021YFA1600603] ; National Science and Technology Major Project[J20191-VI-0010-0124] ; National Natural Science Foundation of China[52071219]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001441630100001
出版者	SPRINGER SINGAPORE PTE LTD
引用统计	被引频次：1[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/321006/179848
专题	中国科学院金属研究所
通讯作者	Wang, Dong; Zhang, Jian
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110089, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ma, Li,Wang, Dong,Zhang, Gong,et al. Effect of Hf on microstructure and creep properties of a hot corrosion resistant nickel-based single crystal superalloy[J]. CHINA FOUNDRY,2025:9.
APA	Ma, Li,Wang, Dong,Zhang, Gong,Shen, Jian,&Zhang, Jian.(2025).Effect of Hf on microstructure and creep properties of a hot corrosion resistant nickel-based single crystal superalloy.CHINA FOUNDRY,9.
MLA	Ma, Li,et al."Effect of Hf on microstructure and creep properties of a hot corrosion resistant nickel-based single crystal superalloy".CHINA FOUNDRY (2025):9.