High ductility in solution-treated Mg-Sc-Yb-Mn-Zr alloy mediated bydislocations

doi:10.1016/j.jallcom.2021.159880

	High ductility in solution-treated Mg-Sc-Yb-Mn-Zr alloy mediated bydislocations
	Zhou, Tianshui 1,2; Liu, Zehua 1,2; Yang, Donglin 1,2; Meng, Shuaiju1,2 ; Jia, Zhi1,2 ; Liu, Dexue1,2
	2021-08-25
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	873
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
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 dislocation As-cast Crystals structures High ductility Mechanical Mg alloy Property Second phase Solid solution treatment Zr alloys
DOI	10.1016/j.jallcom.2021.159880
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000651262600002
出版者	Elsevier Ltd
EI入藏号	20211610236009
EI主题词	Magnesium alloys
EI分类号	531 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
来源库	WOS
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/148459
专题	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
通讯作者	Liu, Dexue
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
第一作者单位	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
通讯作者单位	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
第一作者的第一单位	材料科学与工程学院
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).