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Enhancing fatigue resistance of high-entropy alloy by designing a hierarchically heterogeneous microstructure

文献类型：期刊论文

作者Wang, Xiaodi1; Bai, Wenliang1; Zhang, Zhe1; Wang, Zhengbin2; Ren, Xuechong1
刊名JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
出版日期2024-11-01
卷号33页码:673-682
关键词High-entropy alloy Hierarchically heterogeneous microstructure Fatigue resistance Crack initiation and propagation B2 precipitates
ISSN号2238-7854
DOI10.1016/j.jmrt.2024.09.091
通讯作者Wang, Xiaodi(wangxiaodi@ustb.edu.cn) ; Ren, Xuechong(xcren@ustb.edu.cn)
英文摘要Fatigue property is an important index for novel high-entropy alloys (HEAs) before their engineering applications. Here we engineer a Al03CoCrFeNi HEA with hierarchically heterogeneous microstructure by cold rolling and annealing treatment, which includes heterogeneous grains, annealing and deformation twins, residual dislocations and B2 precipitates with different morphologies, sizes and distributions. Stress-life (S-N) tests and characterization techniques including scanning electron microscope (SEM) and transmission electron microscope (TEM) were carried out to investigate fatigue properties as well as corresponding mechanisms. It is found that this HEA possesses good strength-ductility combination (i.e., yield strength of similar to 870 MPa, ultimate tensile strength of similar to 1060 MPa and ductility of similar to 26 %) and fatigue resistance with fatigue ratio of similar to 0.46 under stress ratio of -1. This fatigue ratio exceeds those of most reported HEAs. High strength renders the fatigue deformation mainly occurs in deformation twin regions decorated with B2 precipitates. Surface damage morphologies indicate that fatigue cracks initiate from persistent slip band-like shear bands. In addition, microstructural hierarchy results in the deflected fatigue crack propagation path, which is beneficial for the enhancement of fatigue resistance. Present results offer the guidance on future design for high fatigue-resistant HEAs by manipulating heterogeneous microstructure.
资助项目Beijing Natural Science Foundation[2222066] ; National Natural Science Foun-dation of China (NSFC)[52101065] ; Interdisciplinary Research Project for Young Teachers of USTB (Fundamental Research Funds for the Central Universities)[FRF-IDRY-22-029]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001318394000001
出版者ELSEVIER
资助机构Beijing Natural Science Foundation ; National Natural Science Foun-dation of China (NSFC) ; Interdisciplinary Research Project for Young Teachers of USTB (Fundamental Research Funds for the Central Universities)
源URL  
专题金属研究所_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, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Xiaodi,Bai, Wenliang,Zhang, Zhe,et al. Enhancing fatigue resistance of high-entropy alloy by designing a hierarchically heterogeneous microstructure[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,33:673-682.
APA Wang, Xiaodi,Bai, Wenliang,Zhang, Zhe,Wang, Zhengbin,&Ren, Xuechong.(2024).Enhancing fatigue resistance of high-entropy alloy by designing a hierarchically heterogeneous microstructure.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,33,673-682.
MLA Wang, Xiaodi,et al."Enhancing fatigue resistance of high-entropy alloy by designing a hierarchically heterogeneous microstructure".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 33(2024):673-682.

入库方式： OAI收割

来源：金属研究所

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