Effect of aging state on corrosion fatigue properties of 7075 aluminum alloy

doi:10.1016/j.ijfatigue.2022.106916

IMR OpenIR

	Effect of aging state on corrosion fatigue properties of 7075 aluminum alloy
	Gong, B. S.1,2; Zhang, Z. J.1,2; Hou, J. P.1; Duan, Q. Q.1; Wang, X. G.1; Zhang, Z. F.1,2
通讯作者	Zhang, Z. J.(zjzhang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2022-08-01
发表期刊	INTERNATIONAL JOURNAL OF FATIGUE
ISSN	0142-1123
卷号	161 页码:8
摘要	The corrosion fatigue performance of Al alloy components is crucial for their engineering applications. This study focuses on the corrosion fatigue properties of 7075 Al alloys in three different aging states, i.e. over-aging (OA), peak-aging (PA) and under-aging (UA) states. The results show that the fatigue damage mechanism of the Al alloy is greatly affected by the stress level. In the high-stress region where the cyclic number is short, the fatigue damage is mainly caused by dislocations accumulation and stress concentration on the grain boundary. Compared with the UA state, the wave slip dislocations at the OA state are easy to accumulate and annihilate at the second phase boundaries, which reduces the fatigue damage degree at the grain boundaries. However, in the low-stress range where the cyclic number is large, the corrosion fatigue life of the Al alloy is mainly controlled by pitting-induced crack initiation. For the OA state, the spacing and size of the precipitated phase are large, so it is easy to trigger corrosive pitting, which reduces the corrosion fatigue performance of the alloy.
关键词	7075 Al alloy Aging state Corrosion fatigue Grain boundaries Pitting
资助者	Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; KC Wong Education Foundation
DOI	10.1016/j.ijfatigue.2022.106916
收录类别	SCI
语种	英语
资助项目	Youth Innovation Promotion Association CAS[2021192] ; National Natural Science Foundation of China (NSFC)[51871223] ; National Natural Science Foundation of China (NSFC)[51790482] ; National Natural Science Foundation of China (NSFC)[52130002] ; Chinese Academy of Sciences[174321KYSB20210002] ; KC Wong Education Foundation[GJTD-2020-09]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000829856700002
出版者	ELSEVIER SCI LTD
引用统计	被引频次：10[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/321006/174666
专题	中国科学院金属研究所
通讯作者	Zhang, Z. J.; Zhang, Z. F.
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Gong, B. S.,Zhang, Z. J.,Hou, J. P.,et al. Effect of aging state on corrosion fatigue properties of 7075 aluminum alloy[J]. INTERNATIONAL JOURNAL OF FATIGUE,2022,161:8.
APA	Gong, B. S.,Zhang, Z. J.,Hou, J. P.,Duan, Q. Q.,Wang, X. G.,&Zhang, Z. F..(2022).Effect of aging state on corrosion fatigue properties of 7075 aluminum alloy.INTERNATIONAL JOURNAL OF FATIGUE,161,8.
MLA	Gong, B. S.,et al."Effect of aging state on corrosion fatigue properties of 7075 aluminum alloy".INTERNATIONAL JOURNAL OF FATIGUE 161(2022):8.