| 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 | |
| Corresponding Author | Yu, Jinjiang(jjyu@imr.ac.cn) ; Moverare, Johan(johan.moverare@liu.se) |
| 2020-05-01 | |
| Source Publication | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| Volume | 163Pages:13 |
| Abstract | 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. |
| Keyword | M951G alloy Low cycle fatigue Fatigue life Cyclic stress amplitude Fracture modes Coarsening of gamma ' precipitates |
| Funding Organization | National Natural Science Foundation of China (NSFC) |
| DOI | 10.1016/j.matchar.2020.110241 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China (NSFC)[51971214] ; National Natural Science Foundation of China (NSFC)[51771191] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000551341700001 |
| Publisher | ELSEVIER SCIENCE INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/139937 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yu, Jinjiang; Moverare, Johan |
| Affiliation | 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 |
| Recommended Citation 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. |
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