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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 AuthorYu, Jinjiang(jjyu@imr.ac.cn) ; Moverare, Johan(johan.moverare@liu.se)
2020-05-01
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume163Pages:13
AbstractLow 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.
KeywordM951G alloy Low cycle fatigue Fatigue life Cyclic stress amplitude Fracture modes Coarsening of gamma ' precipitates
Funding OrganizationNational Natural Science Foundation of China (NSFC)
DOI10.1016/j.matchar.2020.110241
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[51971214] ; National Natural Science Foundation of China (NSFC)[51771191]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS IDWOS:000551341700001
PublisherELSEVIER SCIENCE INC
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/139935
Collection中国科学院金属研究所
Corresponding AuthorYu, Jinjiang; Moverare, Johan
Affiliation1.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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