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

doi:10.1016/j.ijfatigue.2022.106916

CORC > 金属研究所 > 中国科学院金属研究所

	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.2; Duan, Q. Q.2; Wang, X. G.2; Zhang, Z. F.1,2
刊名	INTERNATIONAL JOURNAL OF FATIGUE
	2022-08-01
卷号	161 页码:8
关键词	7075 Al alloy Aging state Corrosion fatigue Grain boundaries Pitting
ISSN号	0142-1123
DOI	10.1016/j.ijfatigue.2022.106916
通讯作者	Zhang, Z. J.(zjzhang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
英文摘要	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.
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
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000829856700002
资助机构	Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; KC Wong Education Foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174665]
专题	金属研究所_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.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 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.