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Investigation on the Fatigue Crack Propagation of Medium-Entropy Alloys with Heterogeneous Microstructures

文献类型：期刊论文

作者Liu, Yang1,2; Jiang, Ping2; Duan, Guihua2; Wang, Jing2; Zhou, Lingling2; Xie, Jijia1,2; Duan GH(段桂花); Jiang P(姜萍); Wang J(王晶); Xie JJ(谢季佳)
刊名MATERIALS
出版日期2022-09-01
卷号15期号:17页码:14
关键词heterogeneous microstructure MEA recrystallization annealing fatigue crack propagation threshold fatigue crack growth path cyclic plastic zone
DOI10.3390/ma15176081
通讯作者Xie, Jijia(xiejj@lnm.imech.ac.cn)
英文摘要The behavior and the mechanism of fatigue crack propagation in CrCoNi medium-entropy alloys (MEAs) with heterogeneous microstructures were investigated in this paper. After cold-rolling and recrystallization annealing at different temperatures and times, five sets of heterostructured specimens were acquired with different recrystallization levels. Then, the structure characterizations of these five sets of specimens were carried out by nanoindentation testing and electron back-scatter diffraction (EBSD) mapping. Finally, the fatigue crack propagation tests were conducted on single edge crack specimens of these different heterogeneous microstructures. The experimental results indicate that the crack propagation rates of specimens with partial recrystallization microstructures are higher than those with complete recrystallization microstructures, and the effect on fatigue crack thresholds of these specimens is the opposite. The fatigue cracks grow along the slip planes or twin boundaries in recrystallization grains (RGs), which induced crack deflections and the roughness-induced crack closure effect. For this reason, the area percentage of recrystallization and the grain size of RGs have a great effect on the value of the fatigue crack growth threshold.
WOS关键词HIGH-CYCLE FATIGUE ; NEAR-THRESHOLD FATIGUE ; STAINLESS-STEEL ; STRENGTH ; INITIATION ; DESIGN ; MECHANISM ; BEHAVIOR ; LIFE
资助项目National Key R&D Program of China[2019YFA 0209900] ; National Key R&D Program of China[2017YFA0204402] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种英语
WOS记录号WOS:000851842500001
资助机构National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://dspace.imech.ac.cn/handle/311007/90028]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Xie, Jijia; Xie JJ(谢季佳)
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Yang,Jiang, Ping,Duan, Guihua,et al. Investigation on the Fatigue Crack Propagation of Medium-Entropy Alloys with Heterogeneous Microstructures[J]. MATERIALS,2022,15(17):14.
APA Liu, Yang.,Jiang, Ping.,Duan, Guihua.,Wang, Jing.,Zhou, Lingling.,...&Liu Y.(2022).Investigation on the Fatigue Crack Propagation of Medium-Entropy Alloys with Heterogeneous Microstructures.MATERIALS,15(17),14.
MLA Liu, Yang,et al."Investigation on the Fatigue Crack Propagation of Medium-Entropy Alloys with Heterogeneous Microstructures".MATERIALS 15.17(2022):14.

入库方式： OAI收割

来源：力学研究所

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