Thermo-mechanical fatigue behavior of a single crystal nickel-based superalloy

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	Thermo-mechanical fatigue behavior of a single crystal nickel-based superalloy
	G. M. Han; J. J. Yu; X. F. Sun; Z. Q. Hu
	2011
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	528 期号:19-20 页码:6217-6224
摘要	Thermo-mechanical fatigue (TMF) behavior in a < 0 0 1 > oriented nickel-based single crystal superalloy was investigated under different cycles of strain and temperature. Fracture surface and microstructural evolution were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) respectively. It was found that the fatigue lives under in-phase (IP) TMF were longer than those of out-of-phase (OP) TMF, and the maximum tensile stress level was concluded to be the lifetime-limiting factor. Compared to isothermal low-cycle fatigue (LCF) lives obtained under the maximum temperature 900 C, thermo-mechanical fatigue lifetime was much shorter. This result indicates that varying temperature superimposed mechanical strain greatly reduces the fatigue lifetime of superalloys. Based on observation of fracture surface and microstructure evolution, it was concluded that creep is the dominant damage mechanism under IP-IMF condition and oxidation causes shorter lifetime for OP-TMF tests. The similarities and differences in the changes of gamma' morphology during in-phase (IP) and out-of-phase (OP) TMF tests were also discussed. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[han, g. m.; yu, j. j.; sun, x. f.; hu, z. q.] chinese acad sci, inst met res, shenyang 110016, peoples r china.;han, gm (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;gmhan@imr.ac.cn
关键词	Nickel Alloys Fatigue Microstructure Damage Mechanism Low-cycle Fatigue High-temperature Life Prediction Creep Oxidation Alloy Mechanisms Morphology Fracture Cmsx-6
URL	查看原文
WOS记录号	WOS:000292432500017
引用统计	被引频次：46[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/321006/30372
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. M. Han,J. J. Yu,X. F. Sun,et al. Thermo-mechanical fatigue behavior of a single crystal nickel-based superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2011,528(19-20):6217-6224.
APA	G. M. Han,J. J. Yu,X. F. Sun,&Z. Q. Hu.(2011).Thermo-mechanical fatigue behavior of a single crystal nickel-based superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,528(19-20),6217-6224.
MLA	G. M. Han,et al."Thermo-mechanical fatigue behavior of a single crystal nickel-based superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 528.19-20(2011):6217-6224.