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

doi:10.1016/j.scriptamat.2023.115643

IMR OpenIR

	Fatigue-induced oxidation assisting microcrack nucleation in Mg-RE alloy under ultrasonic fatigue
	Chen, Yao 1,2; Shuai, Qi 1; Wu, Yujuan 3,4; Peng, Liming 3,4; Shao, Xiaohong 5; Liu, Fulin 1; He, Chao 1; Li, Lang 1; Liu, Yongjie 1; Wang, Qingyuan 1,6; Xie, Shaoxiong 2,6; Chen, Qiang 2
通讯作者	Wu, Yujuan(wuyj@sjtu.edu.cn) ; Wang, Qingyuan(wangqy@scu.edu.cn)
	2023-11-01
发表期刊	SCRIPTA MATERIALIA
ISSN	1359-6462
卷号	236 页码:7
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.
关键词	Mg-RE alloy Very high cycle fatigue Fatigue crack initiation Fatigue-induced oxidation Microcrack nucleation
资助者	National Natural Science Foundation of China ; Natural Science Foundation of Sichuan Province ; JSPS KAKENHI ; JSPS Fellowship
DOI	10.1016/j.scriptamat.2023.115643
收录类别	SCI
语种	英语
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
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001041234100001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：6[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/321006/178763
专题	中国科学院金属研究所
通讯作者	Wu, Yujuan; Wang, Qingyuan
作者单位	1.Sichuan Univ, Failure Mech & Engn Disaster Prevent Key Lab Sichu, Chengdu 610065, Peoples R China 2.Kyushu Univ, Dept Mech Engn, Fukuoka 8190395, Japan 3.Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China 4.Shanghai Jiao Tong Univ, Key State Lab Met Matrix Composites, Shanghai 200240, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 6.Chengdu Univ, Inst Adv Study, Chengdu 610106, 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.