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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
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume646Pages:45-51
AbstractMicrostructural 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.
description.department[shi, l. ; yu, j. j. ; cui, c. y. ; sun, x. f.] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordCo-al-w-base Alloy Microstructures Tensile Properties Dislocation Structures
Funding OrganizationHigh Technology Research and Development Program of China [2014AA041701]; National Natural Science Foundation of China (NFSC) [51171179, 51271174, 51331005, 11332010]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74973
Collection中国科学院金属研究所
Corresponding Authorjjyu@imr.ac.cn
Recommended Citation
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.
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