| Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures | |
| Cui, Luqing1,2,3; Liu, Jinlai1; Peng, Ru Lin3; Yu, Jinjiang1; Moverare, Johan3; Sun, Xiaofeng1 | |
| 通讯作者 | Yu, Jinjiang(jjyu@imr.ac.cn) ; Moverare, Johan(johan.moverare@liu.se) |
| 2020-05-01 | |
| 发表期刊 | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| 卷号 | 163页码:13 |
| 摘要 | Low cycle fatigue (LCF) tests of the newly developed nickel-based superalloy M951G have been conducted at 900 and 1000 degrees C under different total strain amplitudes. Results show that the fatigue properties, fracture mechanisms as well as coarsening of gamma' precipitates are dependent on testing temperatures and strain amplitudes. Fatigue life and cyclic stress response under the same total strain amplitude at 1000 degrees C are lower than that at 900 degrees C, which is due to the degradation of microstructures, shearing of gamma' precipitates by dislocations and serious oxidation. Fracture modes change from intergranular cracking to the mixed mode cracking as the strain amplitude increases. At low strain amplitudes, M951G alloy fails in the form of intergranular cracking owing to the oxidation of surface carbides and the relatively low deformation rate. At higher strain amplitudes, the strain localization in grain interior, the distribution of broken carbides and eutectics as well as the relatively higher strain rate are the main reasons for the formation of transgranular microcracks. Ultimately, the effects of fatigue conditions on coarsening of cubic gamma' precipitates are also analyzed from the aspect of gamma' volume fraction, fatigue life and flow stress difference between the gamma/gamma' interfaces. |
| 关键词 | M951G alloy Low cycle fatigue Fatigue life Cyclic stress amplitude Fracture modes Coarsening of gamma ' precipitates |
| 资助者 | National Natural Science Foundation of China (NSFC) |
| DOI | 10.1016/j.matchar.2020.110241 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China (NSFC)[51971214] ; National Natural Science Foundation of China (NSFC)[51771191] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS类目 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS记录号 | WOS:000551341700001 |
| 出版者 | ELSEVIER SCIENCE INC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/139937 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Yu, Jinjiang; Moverare, Johan |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Linkoping Univ, Dept Management & Engn, Div Engn Mat, SE-58183 Linkoping, Sweden |
| 推荐引用方式 GB/T 7714 | Cui, Luqing,Liu, Jinlai,Peng, Ru Lin,et al. Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures[J]. MATERIALS CHARACTERIZATION,2020,163:13. |
| APA | Cui, Luqing,Liu, Jinlai,Peng, Ru Lin,Yu, Jinjiang,Moverare, Johan,&Sun, Xiaofeng.(2020).Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures.MATERIALS CHARACTERIZATION,163,13. |
| MLA | Cui, Luqing,et al."Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures".MATERIALS CHARACTERIZATION 163(2020):13. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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