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

doi:10.3390/ma15176081

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Investigation on the Fatigue Crack Propagation of Medium-Entropy Alloys with Heterogeneous Microstructures
	Liu, Yang 1,2; Jiang, Ping 2; Duan, Guihua 2; Wang, Jing 2; Zhou, Lingling 2; Xie, Jijia 1,2
刊名	MATERIALS
	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
DOI	10.3390/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.
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关键词	HIGH-CYCLE FATIGUE ; NEAR-THRESHOLD FATIGUE ; STAINLESS-STEEL ; STRENGTH ; INITIATION ; DESIGN ; MECHANISM ; BEHAVIOR ; LIFE
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
内容类型	期刊论文
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
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,&Xie, Jijia.(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.