Thermo-mechanical fatigue behavior of a single crystal nickel-based superalloy
文献类型:期刊论文
作者 | G. M. Han ; J. J. Yu ; X. F. Sun ; Z. Q. Hu |
刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
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出版日期 | 2011 |
卷号 | 528期号:19-20页码:6217-6224 |
关键词 | Nickel alloys Fatigue Microstructure Damage mechanism low-cycle fatigue high-temperature life prediction creep oxidation alloy mechanisms morphology fracture cmsx-6 |
ISSN号 | 0921-5093 |
中文摘要 | 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. |
原文出处 | |
公开日期 | 2012-04-13 |
源URL | [http://210.72.142.130/handle/321006/30372] ![]() |
专题 | 金属研究所_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. |
入库方式: OAI收割
来源:金属研究所
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