High ductility in solution-treated Mg-Sc-Yb-Mn-Zr alloy mediated bydislocations | |
Zhou, Tianshui1,2; Liu, Zehua1,2; Yang, Donglin1,2; Meng, Shuaiju1,2; Jia, Zhi1,2; Liu, Dexue1,2 | |
刊名 | Journal of Alloys and Compounds |
2021-08-25 | |
卷号 | 873 |
关键词 | Aluminum alloys
Binary alloys
Ductility
Grain refinement
Grain size and shape
Manganese alloys
Metal testing
Microstructure
Scandium alloys
Solid solutions
Tensile testing
Yttrium alloys
Zircaloy
|
ISSN号 | 0925-8388 |
DOI | 10.1016/j.jallcom.2021.159880 |
英文摘要 | Due to their unique crystal structure, preparation of high-ductility Mg alloys is still a great challenge, especially high-ductility as-cast or heat-treated Mg alloys. Here, the effect of Sc on the microstructure, second phases, and mechanical properties of as-cast and heat-treated Mg-xSc-3Yb-1Mn-0.5Zr (x = 2, 3, 4, 6 wt%) alloys was investigated systematically. The results indicated that as-cast samples mainly consisted of α-Mg, MgSc, Mg2Yb, Mn2Zr and Mn2Sc phases. Moreover, the average grain sizes of all alloys clearly decreased with the addition of Sc. After solid-solution treatment at 525 °C for 12 h, the tensile elongation (El.) of Mg-xSc-3Yb-1Mn-0.5Zr (x = 2, 3, 4, 6 wt%) alloys improved and the 6 wt% Sc-containing solution-treated sample demonstrated the maximum El. of 28%. Examination of high-ductility solution-treated alloy microstructure revealed that dislocation slip was the primary deformation mechanism during tensile testing. In particular, the high ductility was primarily associated with the activation of profusedislocations, which can significantly accommodate c-axis strain to improve plasticity. Besides, both grain refinement and solid-solution strengthening were also responsible for the large El. of the Mg-6Sc-3Yb-1Mn-0.5Zr alloy. This work can provide useful insights into developing high-ductility Mg alloys using Sc alloying and solution treatment (T4). © 2021 |
WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
语种 | 英语 |
出版者 | Elsevier Ltd |
WOS记录号 | WOS:000651262600002 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/148459] |
专题 | 材料科学与工程学院 省部共建有色金属先进加工与再利用国家重点实验室 |
作者单位 | 1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China |
推荐引用方式 GB/T 7714 | Zhou, Tianshui,Liu, Zehua,Yang, Donglin,et al. High ductility in solution-treated Mg-Sc-Yb-Mn-Zr alloy mediated bydislocations[J]. Journal of Alloys and Compounds,2021,873. |
APA | Zhou, Tianshui,Liu, Zehua,Yang, Donglin,Meng, Shuaiju,Jia, Zhi,&Liu, Dexue.(2021).High ductility in solution-treated Mg-Sc-Yb-Mn-Zr alloy mediated bydislocations.Journal of Alloys and Compounds,873. |
MLA | Zhou, Tianshui,et al."High ductility in solution-treated Mg-Sc-Yb-Mn-Zr alloy mediated bydislocations".Journal of Alloys and Compounds 873(2021). |
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