| Thermally stable nanostructured Al-Mg alloy with relaxed grain boundaries | |
| Xu, W.; Zhang, B.; Du, K.; Li, X. Y.; Lu, K. | |
| Corresponding Author | Li, X. Y.(xyli@imr.ac.cn) |
| 2022-03-01 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 226Pages:10 |
| Abstract | Grain refinement into the nanoscale greatly hardens metals and alloys but reduces the stability. By means of cryogenic plastic deformation at very high strain rates, a high proportion of relaxed grain boundaries (GBs) were generated in an Al-5Mg alloy through emitting partial dislocations from GBs when grain sizes are below a critical value. The nanostructured Al-5Mg alloy with an average grain size of 31 nm exhibited a high hardness of 2.67 GPa and a grain coarsening temperature of about 95 K higher than that of submicro-grains. In addition, Mg depletion rather than segregation at some relaxed GBs was observed, that is in account with considerable compressive strains in the vicinity of the relaxed sigma 9 GB. The re-laxed GBs with Mg depletion are effective in stabilizing the nanostructured Al-Mg alloys. It offers a novel approach to developing stable nanostructured alloys. (C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Keyword | Nanograined structure Al -Mg alloy Thermal stability Grain boundary relaxation Grain boundary depletion |
| Funding Organization | National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Chinese Academy of Sciences |
| DOI | 10.1016/j.actamat.2022.117640 |
| 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] ; Ministry of Science and Technology of the People's Republic of China[2017YFA0700700] ; Chinese Academy of Sciences[zdyz201701] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000799056700003 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/174096 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Li, X. Y. |
| Affiliation | Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Xu, W.,Zhang, B.,Du, K.,et al. Thermally stable nanostructured Al-Mg alloy with relaxed grain boundaries[J]. ACTA MATERIALIA,2022,226:10. |
| APA | Xu, W.,Zhang, B.,Du, K.,Li, X. Y.,&Lu, K..(2022).Thermally stable nanostructured Al-Mg alloy with relaxed grain boundaries.ACTA MATERIALIA,226,10. |
| MLA | Xu, W.,et al."Thermally stable nanostructured Al-Mg alloy with relaxed grain boundaries".ACTA MATERIALIA 226(2022):10. |
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