中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Effect of minor Sc addition on microstructure and stress corrosion cracking behavior of medium strength Al-Zn-Mg alloy

文献类型:期刊论文

作者Li, ZM; Jiang, HC; Wang, YL; Zhang, D; Yan, DS; Rong, LJ
刊名JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
出版日期2018-07-01
卷号34期号:7页码:1172-1179
ISSN号1005-0302
关键词Aluminium alloy Al-3(Sc, Zr, Ti) Recrystallization Stress corrosion cracking
DOI10.1016/j.jmst.2017.11.042
英文摘要Influence 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.
学科主题Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000434132800014
源URL[http://ir.imr.ac.cn/handle/321006/80134]  
专题金属研究所_中国科学院金属研究所
作者单位1.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
推荐引用方式
GB/T 7714
Li, ZM,Jiang, HC,Wang, YL,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, ZM,Jiang, HC,Wang, YL,Zhang, D,Yan, DS,&Rong, LJ.(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, ZM,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.

入库方式: OAI收割

来源:金属研究所

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