Enhanced fatigue resistance of a face-centered-cubic single-phase Al0.3CoCrFeNi high-entropy alloy through planar deformation characteristic

doi:10.1016/j.msea.2022.144499

IMR OpenIR

	Enhanced fatigue resistance of a face-centered-cubic single-phase Al0.3CoCrFeNi high-entropy alloy through planar deformation characteristic
	Wang, Xiaodi 1; Bai, Wenliang 1; Zhang, Zhe 1; Wang, Zhengbin 2; Ren, Xuechong 1
通讯作者	Wang, Xiaodi(wangxiaodi@ustb.edu.cn) ; Ren, Xuechong(xcren@ustb.edu.cn)
	2023-01-18
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	862 页码:14
摘要	High-entropy alloys (HEAs) represent a new class of materials with excellent mechanical properties. However, more studies on the fatigue behavior of HEAs are urgently required before they can be used in engineering applications. Here, we report the four-point-bending fatigue properties of a face-centered-cubic (fcc) single-phase Al0.3CoCrFeNi HEA under a stress ratio of 0.1 and testing frequency of 40 Hz, as well as the corresponding fatigue mechanisms based on scanning electron microscopy and transmission electron microscopy images. This HEA exhibited a fatigue endurance limit of similar to 248 MPa and fatigue ratio of similar to 0.3, exceeding those of other fcc single-phase HEAs when compared using an identical stress ratio of -1. Good fatigue properties are attributed to the formation of planar dislocations, stacking faults, and deformation twins. Fatigue cracks were found to form at the slip bands, grain boundaries, and twin boundaries simultaneously under high stress levels; however, twinboundary cracks vanished under low stress levels. The interaction of planar dislocations with grain boundaries and twin boundaries is the reason for the occurrence of their cracking behaviors based on microstructural observation. In addition, fatigue cracks propagated in a deflected manner, even forming a zig-zag path locally, which is beneficial for fatigue resistance. The present findings offer a viable path for the design of HEAs with improved fatigue properties through the enhancement of their planar deformation characteristics.
关键词	High -entropy alloys Fatigue properties Fatigue cracking modes Stacking faults Deformation twins Fatigue crack propagation
资助者	Beijing Natural Science Foundation ; National Natural Science Foundation of China (NSFC)
DOI	10.1016/j.msea.2022.144499
收录类别	SCI
语种	英语
资助项目	Beijing Natural Science Foundation ; National Natural Science Foundation of China (NSFC) ; [2222066] ; [52101065]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000904651100002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/175632
专题	中国科学院金属研究所
通讯作者	Wang, Xiaodi; Ren, Xuechong
作者单位	1.Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaodi,Bai, Wenliang,Zhang, Zhe,et al. Enhanced fatigue resistance of a face-centered-cubic single-phase Al0.3CoCrFeNi high-entropy alloy through planar deformation characteristic[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,862:14.
APA	Wang, Xiaodi,Bai, Wenliang,Zhang, Zhe,Wang, Zhengbin,&Ren, Xuechong.(2023).Enhanced fatigue resistance of a face-centered-cubic single-phase Al0.3CoCrFeNi high-entropy alloy through planar deformation characteristic.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,862,14.
MLA	Wang, Xiaodi,et al."Enhanced fatigue resistance of a face-centered-cubic single-phase Al0.3CoCrFeNi high-entropy alloy through planar deformation characteristic".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 862(2023):14.