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Fatigue-induced oxidation assisting microcrack nucleation in Mg-RE alloy under ultrasonic fatigue

文献类型：期刊论文

作者Chen, Yao4,5; Shuai, Qi5; Wu, Yujuan2,3; Peng, Liming2,3; Shao, Xiaohong6; Liu, Fulin5; He, Chao5; Li, Lang5; Liu, Yongjie5; Wang, Qingyuan1,5
刊名SCRIPTA MATERIALIA
出版日期2023-11-01
卷号236页码:7
关键词Mg-RE alloy Very high cycle fatigue Fatigue crack initiation Fatigue-induced oxidation Microcrack nucleation
ISSN号1359-6462
DOI10.1016/j.scriptamat.2023.115643
通讯作者Wu, Yujuan(wuyj@sjtu.edu.cn) ; Wang, Qingyuan(wangqy@scu.edu.cn)
英文摘要Characterizing the transition from a crack-free to a cracked state remains a challenging topic in fatigue. Mg-rare earth alloys, containing the long-period stacking ordered (LPSO) phase, exhibit superior mechanical properties. Here, microcracks are found to nucleate at the soft & alpha;-Mg nano-layers, away from the LPSO lamellae. Notably, severe oxidation is observed along the damage bands. Based on the detailed characterizations, it is suggested that dislocation motions continuously bring the new & alpha;-Mg matrix to oxidation transformation, resulting in the thickening MgO layer. However, once the fatigue-induced oxide reaches a certain thickness, it starts acting as a barrier for the further dislocation motions. As a result, dislocation accumulation and cumulative damage occur in the region ahead of the thick oxide, causing microcrack nucleation. This fatigue-induced oxidation, assisting microcrack nucleation, is distinct from the existing fatigue mechanisms.
资助项目National Natural Science Foundation of China[12102280] ; National Natural Science Foundation of China[11832007] ; National Natural Science Foundation of China[12072212] ; Natural Science Foundation of Sichuan Province[2022NSFSC0337] ; JSPS KAKENHI[JP22K03828] ; JSPS Fellowship[JP22F22720]
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001041234100001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; Natural Science Foundation of Sichuan Province ; JSPS KAKENHI ; JSPS Fellowship
源URL[http://ir.imr.ac.cn/handle/321006/178762]  
专题金属研究所_中国科学院金属研究所
通讯作者Wu, Yujuan; Wang, Qingyuan
作者单位1.Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China
2.Shanghai Jiao Tong Univ, Key State Lab Met Matrix Composites, Shanghai 200240, Peoples R China
3.Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
4.Kyushu Univ, Dept Mech Engn, Fukuoka 8190395, Japan
5.Sichuan Univ, Failure Mech & Engn Disaster Prevent Key Lab Sichu, Chengdu 610065, Peoples R China
6.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Yao,Shuai, Qi,Wu, Yujuan,et al. Fatigue-induced oxidation assisting microcrack nucleation in Mg-RE alloy under ultrasonic fatigue[J]. SCRIPTA MATERIALIA,2023,236:7.
APA Chen, Yao.,Shuai, Qi.,Wu, Yujuan.,Peng, Liming.,Shao, Xiaohong.,...&Chen, Qiang.(2023).Fatigue-induced oxidation assisting microcrack nucleation in Mg-RE alloy under ultrasonic fatigue.SCRIPTA MATERIALIA,236,7.
MLA Chen, Yao,et al."Fatigue-induced oxidation assisting microcrack nucleation in Mg-RE alloy under ultrasonic fatigue".SCRIPTA MATERIALIA 236(2023):7.

入库方式： OAI收割

来源：金属研究所

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