| 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 Author | Jiang, Haichang(hcjiang@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn) |
| 2018-07-01 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 34Issue:7Pages:1172-1179 |
| Abstract | 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. |
| Keyword | Aluminium alloy Al-3(Sc, Zr, Ti) Recrystallization Stress corrosion cracking |
| Funding Organization | State's Key Project of Research and Development ; Strategic Priority Program of the Chinese Academy of Sciences |
| DOI | 10.1016/j.jmst.2017.11.042 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | State'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 Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000434132800014 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/128335 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Jiang, Haichang; Rong, Lijian |
| Affiliation | 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 |
| 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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