High temperature creep and low cycle fatigue of a nickel-base superalloy

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	High temperature creep and low cycle fatigue of a nickel-base superalloy
	J. J. Yu; X. F. Sun; T. Jin; N. R. Zhao; H. R. Guan; Z. Q. Hu
	2010
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	527 期号:9 页码:2379-2389
摘要	The creep and low cycle fatigue behaviour of a nickel-base superalloy was investigated. The creep curves show an obvious primary creep stage followed by a short steady-state creep stage and then an accelerating creep stage leading to failure at 700 degrees C. The 900 degrees C creep Curves demonstrate a shorter primary stage, and a longer accelerating creep stage without steady-state creep stage. The creep and low cycle fatigue properties simultaneously degenerate with increasing temperature. The longer primary creep stage corresponds with the relatively long cyclic hardening during low cycle fatigue at 700 degrees C. The slow cyclic softening is consistent with the prolonged acceleration creep stage at 900 degrees C. The low cycle fatigue deformation is controlled by dislocations moving through gamma matrix channels Controlled by the Orowan mechanism and dislocation loops shearing gamma' precipitates at 700 degrees C, which is similar to the primary creep stage deformation mechanism. Furthermore, dislocation climb, slip and interaction between dislocations and carbides are the dominant creep deformation mechanism as well as the main low cycle deformation mechanism at 900 degrees C. (C) 2010 Elsevier B.V. All rights reserved.
部门归属	[yu jinjiang; sun xiaofeng; jin tao; zhao nairen; guan hengrong; hu zhuangqi] chinese acad sci, inst met res, shenyang, liaoning, peoples r china.;yu, jj (reprint author), chinese acad sci, inst met res, wenhua rd 72, shenyang, liaoning, peoples r china;jjyu@imr.ac.cn
关键词	Single Crystal Ni-base Superalloy Creep Low Cycle Fatigue Fracture Characteristic Deformation Structure Single-crystal Superalloys Deformation-behavior Dislocation-structure Anisotropic Creep Crack-growth Mechanisms Fracture Microstructures Gamma'-phase Cmsx-4
URL	查看原文
WOS记录号	WOS:000275592200028
引用统计	被引频次：55[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/321006/31659
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. J. Yu,X. F. Sun,T. Jin,et al. High temperature creep and low cycle fatigue of a nickel-base superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2010,527(9):2379-2389.
APA	J. J. Yu,X. F. Sun,T. Jin,N. R. Zhao,H. R. Guan,&Z. Q. Hu.(2010).High temperature creep and low cycle fatigue of a nickel-base superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,527(9),2379-2389.
MLA	J. J. Yu,et al."High temperature creep and low cycle fatigue of a nickel-base superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 527.9(2010):2379-2389.