Microstructural stability and tensile properties of a Ti-containing single-crystal Co-Ni-Al-W-base alloy

IMR OpenIR

	Microstructural stability and tensile properties of a Ti-containing single-crystal Co-Ni-Al-W-base alloy
	Shi, L.; Yu, J. J.; Cui, C. Y.; Sun, X. F.; jjyu@imr.ac.cn
	2015
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	646 页码:45-51
摘要	Microstructural stability and tensile properties of a Ti-containing single-crystal Co-Ni-Al-W-alloy with low tungsten content have been investigated. The alloy possesses relatively lower density and higher gamma' solvus temperature compared to some high-tungsten-content Co-Al-W-base alloys. After aging at 900-1000 degrees C for 400 h, the alloy maintains the stable gamma/gamma' two-phase microstructure without the presence of secondary phases. In the low and medium temperature range (R.T.-800 degrees C), the alloy exhibits superior tensile strength compared to the reported single-crystal Co-Al-W-base alloys, while above 800 degrees C, the yield stress decreases rapidly with temperature increasing. The major deformation mechanisms of the alloy consist of shearing of the gamma' precipitates by pairs of a/2 < 110 >-type dislocations from room temperature to 800 degrees C and bypassing of the gamma' precipitates by a/2 < 110 >-type matrix dislocations above 900 degrees C. At 900 degrees C, it shows a transition from the gamma' shearing to bypassing. (C) 2015 Elsevier B.V. All rights reserved.
部门归属	[shi, l. ; yu, j. j. ; cui, c. y. ; sun, x. f.] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Co-al-w-base Alloy Microstructures Tensile Properties Dislocation Structures
资助者	High Technology Research and Development Program of China [2014AA041701]; National Natural Science Foundation of China (NFSC) [51171179, 51271174, 51331005, 11332010]
收录类别	sci
语种	英语
WOS记录号	WOS:000362132000006
引用统计	被引频次：37[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/321006/74973
专题	中国科学院金属研究所
通讯作者	jjyu@imr.ac.cn
推荐引用方式 GB/T 7714	Shi, L.,Yu, J. J.,Cui, C. Y.,et al. Microstructural stability and tensile properties of a Ti-containing single-crystal Co-Ni-Al-W-base alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2015,646:45-51.
APA	Shi, L.,Yu, J. J.,Cui, C. Y.,Sun, X. F.,&jjyu@imr.ac.cn.(2015).Microstructural stability and tensile properties of a Ti-containing single-crystal Co-Ni-Al-W-base alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,646,45-51.
MLA	Shi, L.,et al."Microstructural stability and tensile properties of a Ti-containing single-crystal Co-Ni-Al-W-base alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 646(2015):45-51.