The creep deformation behavior of a single-crystal Co-Al-W-base superalloy at 900 degrees C

doi:10.1016/j.msea.2015.03.063

IMR OpenIR

	The creep deformation behavior of a single-crystal Co-Al-W-base superalloy at 900 degrees C
	Shi, L.; Yu, J. J.; Cui, C. Y.; Sun, X. F.
通讯作者	Yu, J. J.(jjyu@imr.ac.cn)
	2015-05-21
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	635 页码:50-58
摘要	The creep deformation behavior of a single-crystal Co-Al-W-Ni-Cr-Ta alloy with low tungsten content has been studied at stresses between 275 and 310 MPa at 900 degrees C. The alloy exhibits comparable creep strength with that of Co-Al-W-base alloys containing more tungsten. The creep deformation consists of three stages, the primary stage, the steady-state stage and the tertiary stage, when described by the creep strain rate versus time curve. At 900 degrees C, gamma' precipitates tend to raft along the direction of applied tensile stress in the steady-state creep stage and a topologically inverted and rafting gamma/gamma' microstructure is formed in the tertiary stage. The main deformation mechanism in the primary creep stage is dislocation shearing of gamma' precipitates, and in the following creep stages, the dominant deformation mechanism is dislocations bypassing gamma' precipitates. (C) 2015 Elsevier B.V. All rights reserved.
关键词	Co-Al-W-base alloy Creep behavior Microstructure Dislocation structures
资助者	High Technology Research and Development Program of China ; National Natural Science Foundation of China (NSFC)
DOI	10.1016/j.msea.2015.03.063
收录类别	SCI
语种	英语
资助项目	High Technology Research and Development Program of China[2014AA041701] ; National Natural Science Foundation of China (NSFC)[51171179] ; National Natural Science Foundation of China (NSFC)[51271174] ; National Natural Science Foundation of China (NSFC)[51331005] ; National Natural Science Foundation of China (NSFC)[11332010]
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:000354582600007
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/81045
通讯作者	Yu, J. J.
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Shi, L.,Yu, J. J.,Cui, C. Y.,et al. The creep deformation behavior of a single-crystal Co-Al-W-base superalloy at 900 degrees C[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2015,635:50-58.
APA	Shi, L.,Yu, J. J.,Cui, C. Y.,&Sun, X. F..(2015).The creep deformation behavior of a single-crystal Co-Al-W-base superalloy at 900 degrees C.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,635,50-58.
MLA	Shi, L.,et al."The creep deformation behavior of a single-crystal Co-Al-W-base superalloy at 900 degrees C".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 635(2015):50-58.