| Stress corrosion cracking resistant nanostructured Al-Mg alloy with low angle grain boundaries | |
| Xu, W.1; Xin, Y. C.1,2; Zhang, B.1; Li, X. Y.1 | |
| Corresponding Author | Zhang, B.(bxz011@imr.ac.cn) ; Li, X. Y.(xyli@imr.ac.cn) |
| 2022-02-15 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 225Pages:13 |
| Abstract | For decades, high susceptibility to intergranular corrosion and stress corrosion cracking is the Achilles's heel for the 5xxx series Al alloys with high Mg ( > 3 wt%) owing to precipitation of electrochemically active Mg-rich ,B phase at grain boundaries (GBs) at moderately elevated temperatures. Herein, nanostructured Al-5Mg alloy with a high proportion of low angle grain boundary equiaxed grains were generated by dynamic plastic deformation and appropriate annealing treatment. Electron back-scattered diffraction discloses that the fraction of low angle boundaries reaches 70%, which has been demonstrated to greatly suppress the precipitation of ,B phase at GBs. The nanostructured Al-5Mg alloy exhibits excellent intergranular corrosion resistance and stress corrosion cracking resistance after being sensitized at 150 degrees C for 100 h. Moreover, its strength and ductility are much higher than the corresponding coarse-grained alloys, thus solving the classic problem that has existed for decades. The introduction of a high fraction of low angle grain boundaries by dynamic plastic deformation and appropriate annealing provides a novel strategy for the development of advanced nanostructured Al alloys. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Keyword | Al-Mg alloy Stress corrosion cracking Low angle grain boundary Nanostructured Dynamic plastic deformation |
| Funding Organization | National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China |
| DOI | 10.1016/j.actamat.2021.117607 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[52171088] ; Ministry of Science and Technology of the People's Republic of China[2017YFA0204401 and2017YFA0700700] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000793150200005 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/173927 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, B.; Li, X. Y. |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| Recommended Citation GB/T 7714 | Xu, W.,Xin, Y. C.,Zhang, B.,et al. Stress corrosion cracking resistant nanostructured Al-Mg alloy with low angle grain boundaries[J]. ACTA MATERIALIA,2022,225:13. |
| APA | Xu, W.,Xin, Y. C.,Zhang, B.,&Li, X. Y..(2022).Stress corrosion cracking resistant nanostructured Al-Mg alloy with low angle grain boundaries.ACTA MATERIALIA,225,13. |
| MLA | Xu, W.,et al."Stress corrosion cracking resistant nanostructured Al-Mg alloy with low angle grain boundaries".ACTA MATERIALIA 225(2022):13. |
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