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Effect of minor Sc addition on microstructure and stress corrosion cracking behavior of medium strength Al-Zn-Mg alloy
Li, Zhaoming1,2; Jiang, Haichang1; Wang, Yunli1; Zhang, Duo1; Yan, Desheng1; Rong, Lijian1
Corresponding AuthorJiang, Haichang(hcjiang@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn)
2018-07-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume34Issue:7Pages:1172-1179
AbstractInfluence of Sc content on microstructure and stress corrosion cracking behavior of medium strength Al-Zn-Mg alloy have been investigated by optical microscopy, scanning electron microscopy, electron backscatter diffraction, transmission electron microscopy and slow strain rate test. The results indicate that the addition of Sc results in the formation of the quaternary coherent Al-3(Sc, Zr, Ti) dispersoids during homogenization treatment, which will inhibit the dynamic recrystallization behavior. The number density of Al-3(Sc, Zr, Ti) particles increases with the increase of Sc content, and thus the recrystallization fraction of hot-extruded alloy is reduced and the peak strength in two-stage artificial aging sample is enhanced. At the same time, the wide of precipitation free zone is reduced, and the content of Zn and Mg in grain boundary particles and precipitation free zone is increased with the increase of Sc content. In peak-aged state, the 0.06 wt% Sc added alloy shows the better stress corrosion cracking resistance than the Sc-free alloy because of the reduction of recrystallization fraction and the interrupted distribution of grain boundary precipitates along grain boundary. However, the further addition of Sc to 0.11 wt% will result in the deterioration of stress corrosion cracking resistance due to the increase of electrochemical activity of grain boundary particles and precipitation free zone as well as hydrogen embrittlement. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordAluminium alloy Al-3(Sc, Zr, Ti) Recrystallization Stress corrosion cracking
Funding OrganizationState's Key Project of Research and Development ; Strategic Priority Program of the Chinese Academy of Sciences
DOI10.1016/j.jmst.2017.11.042
Indexed BySCI
Language英语
Funding ProjectState's Key Project of Research and Development[2016YFB1200600] ; State's Key Project of Research and Development[2016YFB1200504] ; Strategic Priority Program of the Chinese Academy of Sciences[XDB22000000]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000434132800014
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/128335
Collection中国科学院金属研究所
Corresponding AuthorJiang, Haichang; Rong, Lijian
Affiliation1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Zhaoming,Jiang, Haichang,Wang, Yunli,et al. Effect of minor Sc addition on microstructure and stress corrosion cracking behavior of medium strength Al-Zn-Mg alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(7):1172-1179.
APA Li, Zhaoming,Jiang, Haichang,Wang, Yunli,Zhang, Duo,Yan, Desheng,&Rong, Lijian.(2018).Effect of minor Sc addition on microstructure and stress corrosion cracking behavior of medium strength Al-Zn-Mg alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(7),1172-1179.
MLA Li, Zhaoming,et al."Effect of minor Sc addition on microstructure and stress corrosion cracking behavior of medium strength Al-Zn-Mg alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.7(2018):1172-1179.
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