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
2021-08-25
Source PublicationJournal of Alloys and Compounds
ISSN0925-8388
Volume873
AbstractDue 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
KeywordAluminum alloys Binary alloys Ductility Grain refinement Grain size and shape Manganese alloys Metal testing Microstructure Scandium alloys Solid solutions Tensile testing Yttrium alloys Zircaloy dislocation As-cast Crystals structures High ductility Mechanical Mg alloy Property Second phase Solid solution treatment Zr alloys
DOI10.1016/j.jallcom.2021.159880
Indexed ByEI
Language英语
PublisherElsevier Ltd
EI Accession Number20211610236009
EI KeywordsMagnesium alloys
EI Classification Number531 Metallurgy and Metallography ; 541.2 Aluminum Alloys ; 542.2 Magnesium and Alloys ; 543.2 Manganese and Alloys ; 549.2 Alkaline Earth Metals ; 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals ; 933 Solid State Physics ; 951 Materials Science
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Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/148459
Collection省部共建有色金属先进加工与再利用国家重点实验室
材料科学与工程学院
Affiliation1.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
First Author AffilicationColl Mat Sci & Engn;  Lanzhou University of Technology
First Signature AffilicationColl Mat Sci & Engn
Recommended Citation
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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