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Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments
Li, Zhaoming1,2; Jiang, Haichang1; Yan, Desheng1; Rong, Lijian1
Corresponding AuthorJiang, Haichang(hcjiang@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn)
2018-04-01
Source PublicationMETALS
ISSN2075-4701
Volume8Issue:4Pages:12
AbstractStress corrosion cracking (SCC) susceptibilities of Al-Zn-Mg alloys without and with Scandium addition were evaluated in 3.5% NaCl solution at different pH and different strain rate, using slow strain rate test technique. The results indicate that Sc addition reduces grain size and width of precipitation free zones, and transforms grain boundary precipitates from continuous distribution into interrupted distribution by inhibiting recrystallization. In solution at pH 1, pH 3 and pH 7, Sc addition reduces the degree of localized corrosion of alloy surface and SCC susceptibility of Al-Zn-Mg alloy. However, in solution at pH 10 and pH 12, grain refinement significantly promotes the diffusion of hydrogen atoms into matrix, thus Sc addition increases SCC susceptibility of Al-Zn-Mg alloy. Under different strain rate conditions, Sc addition can all reduce SCC susceptibility of Al-Zn-Mg alloy in solution at pH 1, pH 3 and pH 7, and can all increase SCC susceptibility of Al-Zn-Mg alloy in solution at pH 10 and pH 12. As a result, Sc modified Al-Zn-Mg alloy in practical applications should be avoided in alkaline environments.
KeywordAl-Zn-Mg alloy solution pH strain rate stress corrosion cracking susceptibility
Funding OrganizationState's Key Project of Research and Development ; Strategic Priority Program of the Chinese Academy of Sciences
DOI10.3390/met8040225
Indexed BySCI
Language英语
Funding ProjectState's Key Project of Research and Development[2016YFB1200600] ; 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:000434882800028
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/128571
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, 19 Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Zhaoming,Jiang, Haichang,Yan, Desheng,et al. Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments[J]. METALS,2018,8(4):12.
APA Li, Zhaoming,Jiang, Haichang,Yan, Desheng,&Rong, Lijian.(2018).Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments.METALS,8(4),12.
MLA Li, Zhaoming,et al."Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments".METALS 8.4(2018):12.
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