Synchronous improvement of mechanical properties and stress corrosion resistance by stress-aging coupled with natural aging pre-treatment in an Al-Zn-Mg alloy with high recrystallization fraction

doi:10.1016/j.jmst.2021.11.068

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	Synchronous improvement of mechanical properties and stress corrosion resistance by stress-aging coupled with natural aging pre-treatment in an Al-Zn-Mg alloy with high recrystallization fraction
	Zhang, D.1,2,3; Jiang, H. C.1,2,4; Cui, Z. J.1,2,3; Yan, D. S.1,2; Song, Y. Y.1,2; Rong, L. J.1,2
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2022-09-10
卷号	121 页码:40-51
关键词	Al-Zn-Mg alloy Natural aging Stress-aging Precipitates Stress corrosion cracking
ISSN号	1005-0302
DOI	10.1016/j.jmst.2021.11.068
通讯作者	Jiang, H. C.(hcjiang@imr.ac.cn) ; Rong, L. J.(ljrong@imr.ac.cn)
英文摘要	Enhancing the strength of Al-Zn-Mg alloys is critical to the weight-lightening of structural components in the application of high-speed trains and aerospace industries, while high stress corrosion cracking (SCC) susceptibility of Al-Zn-Mg alloys (especially the alloy with high recrystallization fraction) with high strength makes it difficult. In this study, the influence of tensile stress-aging coupled with natural aging pre-treatment on the mechanical properties and SCC resistance of Al-Zn-Mg alloy with high recrystallization fraction has been investigated. The results show that tensile stress-aging at 160 degrees C can inhibit the dissolution of clusters/Guinier-Preston (GP) zones formed during long-term natural aging pre-treatment, which increases the number density of matrix precipitates (MPts), narrow the width of precipitate free zone (PFZ), and dramatically improve the mechanical properties of the experimental Al-Zn-Mg alloy. Meanwhile, the precipitation of the high density of MPts within the matrix will assume a large number of solute atoms during artificial aging, which will reduce the supplement of solute atoms to grain boundaries. As a result, the volume of anodic active grain boundary precipitates (GBPs) and the content of free solute atoms at grain boundaries are reduced, which reduces the possibility of initial nucleation and propagation of SCC crack. The coupled treatment method proposed in this study proves efficient in resolving the contradiction between the strength and SCC resistance in Al-Zn-Mg alloy. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	National Key R&D Program of China[2016YFB1200602] ; Strategic Priority Program of the Chinese Academy of Sciences[XDB22020200] ; Shenyang Key R&D and Technology Transfer program[Z19-1- 004]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000788271900005
资助机构	National Key R&D Program of China ; Strategic Priority Program of the Chinese Academy of Sciences ; Shenyang Key R&D and Technology Transfer program
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172614]
专题	金属研究所_中国科学院金属研究所
通讯作者	Jiang, H. C.; Rong, L. J.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Shandong Key Lab Adv Aluminum Mat & Technol, Binzhou 256606, Peoples R China
推荐引用方式 GB/T 7714	Zhang, D.,Jiang, H. C.,Cui, Z. J.,et al. Synchronous improvement of mechanical properties and stress corrosion resistance by stress-aging coupled with natural aging pre-treatment in an Al-Zn-Mg alloy with high recrystallization fraction[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,121:40-51.
APA	Zhang, D.,Jiang, H. C.,Cui, Z. J.,Yan, D. S.,Song, Y. Y.,&Rong, L. J..(2022).Synchronous improvement of mechanical properties and stress corrosion resistance by stress-aging coupled with natural aging pre-treatment in an Al-Zn-Mg alloy with high recrystallization fraction.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,121,40-51.
MLA	Zhang, D.,et al."Synchronous improvement of mechanical properties and stress corrosion resistance by stress-aging coupled with natural aging pre-treatment in an Al-Zn-Mg alloy with high recrystallization fraction".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 121(2022):40-51.