Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures

doi:10.1016/j.matchar.2020.110241

CORC > 金属研究所 > 中国科学院金属研究所

	Low cycle fatigue behavior and microstructural evolution of nickel-based superalloy M951G at elevated temperatures
	Cui, Luqing 1,2,3; Liu, Jinlai 2; Peng, Ru Lin 1; Yu, Jinjiang 2; Moverare, Johan 1; Sun, Xiaofeng 2
刊名	MATERIALS CHARACTERIZATION
	2020-05-01
卷号	163 页码:13
关键词	M951G alloy Low cycle fatigue Fatigue life Cyclic stress amplitude Fracture modes Coarsening of gamma ' precipitates
ISSN号	1044-5803
DOI	10.1016/j.matchar.2020.110241
通讯作者	Yu, Jinjiang(jjyu@imr.ac.cn) ; Moverare, Johan(johan.moverare@liu.se)
英文摘要	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.
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
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000551341700001
资助机构	National Natural Science Foundation of China (NSFC)
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139934]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yu, Jinjiang; Moverare, Johan
作者单位	1.Linkoping Univ, Dept Management & Engn, Div Engn Mat, SE-58183 Linkoping, Sweden 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
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.