Enhancing microstructural stability and creep properties by Ta addition in Ni-based single crystal superalloys

doi:10.1016/j.msea.2024.146873

IMR OpenIR

	Enhancing microstructural stability and creep properties by Ta addition in Ni-based single crystal superalloys
	Gao, Yuting 1,2; Dong, Jiasheng 1; Wang, Li 1; Liu, Pengcheng 1,2; Zhang, Jiachen 3; Lou, Langhong 1
通讯作者	Dong, Jiasheng(djs@imr.ac.cn)
	2024-09-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	909 页码:15
摘要	To investigate influences of Ta content on microstructural stability during thermal exposure at 900 degrees C (up to 3000 h) and creep properties at 980 degrees C/163 MPa in Ni-based SX superalloy, alloys with 7Ta, 8Ta and 9Ta (wt.%) were studied utilizing DSC, SEM, TEM, HR-XRD and APT. The results shows that Ta addition enhanced the partitioning behavior of alloying elements. Besides, lattice misfit was controlled by both alloy composition and temperature. Ta addition increased absolute misfit both room temperature and 980 degrees C. The difference was that the gamma/gamma ' lattice misfit changed from positive to negative at room temperature. The gamma ' coarsening indicated that Ta addition reduced the effective diffusion coefficient and exacerbated W segregation at gamma/gamma ' interface, which was beneficial to improve the microstructural stability. Merging of several adjacent gamma ' precipitates in preferred direction was observed to be delayed with increasing Ta content, which occurred at 500 h for 7Ta alloy, 800 h for 8Ta alloy and 1000 h for 9Ta alloy, respectively. Ta addition affected the diffusion kinetics and greatly prolonged the steady creep duration, and then resulted in longer creep rupture life. It was discussed based on the gamma matrix channels, gamma ' raft thickness, the perfection degree of gamma ' rafts, residual gamma ' precipitates, interfacial dislocation networks and solid solution strengthening.
关键词	Ni-based single crystal superalloy Tantalum Lattice misfit Thermal exposure Creep
资助者	National Science and Technology Major Project
DOI	10.1016/j.msea.2024.146873
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project[2017 -VI -0019-0091]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001261606300001
出版者	ELSEVIER SCIENCE SA
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/321006/187732
专题	中国科学院金属研究所
通讯作者	Dong, Jiasheng
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China
推荐引用方式 GB/T 7714	Gao, Yuting,Dong, Jiasheng,Wang, Li,et al. Enhancing microstructural stability and creep properties by Ta addition in Ni-based single crystal superalloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,909:15.
APA	Gao, Yuting,Dong, Jiasheng,Wang, Li,Liu, Pengcheng,Zhang, Jiachen,&Lou, Langhong.(2024).Enhancing microstructural stability and creep properties by Ta addition in Ni-based single crystal superalloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,909,15.
MLA	Gao, Yuting,et al."Enhancing microstructural stability and creep properties by Ta addition in Ni-based single crystal superalloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 909(2024):15.