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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.; jjyu@imr.ac.cn
2015
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume635Pages:50-58
AbstractThe 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.
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 Creep Behavior Microstructure Dislocation Structures
Funding OrganizationHigh Technology Research and Development Program of China [2014AA041701]; National Natural Science Foundation of China (NSFC) [51171179, 51271174, 51331005, 11332010]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75186
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. 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.,&jjyu@imr.ac.cn.(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.
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