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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.1,3,4; Cui, Z. J.1,2,3; Yan, D. S.1,3; Song, Y. Y.1,3; Rong, L. J.1,3
Corresponding AuthorJiang, H. C.(hcjiang@imr.ac.cn) ; Rong, L. J.(ljrong@imr.ac.cn)
2022-09-10
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume121Pages:40-51
AbstractEnhancing 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.
KeywordAl-Zn-Mg alloy Natural aging Stress-aging Precipitates Stress corrosion cracking
Funding OrganizationNational Key R&D Program of China ; Strategic Priority Program of the Chinese Academy of Sciences ; Shenyang Key R&D and Technology Transfer program
DOI10.1016/j.jmst.2021.11.068
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000788271900005
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/172615
Collection中国科学院金属研究所
Corresponding AuthorJiang, H. C.; Rong, L. J.
Affiliation1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
4.Shandong Key Lab Adv Aluminum Mat & Technol, Binzhou 256606, Peoples R China
Recommended Citation
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.
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