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Effect of twin and grain size strengthening on tensile properties of a multi-directionally impact forged Mg-Gd-Y alloy
Lu, S. H.1,2; Wu, D.2; Yan, M.1; Chen, R. S.2
Corresponding AuthorYan, M.(yanm@sustech.edu.cn) ; Chen, R. S.(rschen@imr.ac.cn)
2021-11-01
Source PublicationJOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN2238-7854
Volume15Pages:4502-4515
AbstractThe microstructure and tensile properties of twin and grain size strengthening Mg-6.85Gd -5.79Y-0.44Zr alloy have been investigated and characterized by optical microscopy (OM), scanning electron microscopy (SEM), and electron back-scattering diffraction (EBSD). Their room temperature tensile results exhibit that twin strengthening can enhance the strength of Mg-Gd-Y-Zr alloy but sacrifice its ductility or toughness. This should be attributed that lenticular {10-12} twins with high-stress localization directly lead to a brittle failure. In contrast, the strength, ductility, and toughness were synchronously improved for the grain size strengthening Mg-Gd-Y-Zr alloy, i.e., the ultimate tensile strength, uniform elongation, and static toughness increased to 254 (259-245) MPa, 1.02 (1.40-0.55)%, and 5.7 (6.7 -4.2) MJ/m(3), respectively. This ductility increment should have resulted from fine recrystallization that was free from stress concentration and accommodated the tensile strain by more non-basal slip and grain boundary sliding or grain rotation. (C) 2021 The Authors. Published by Elsevier B.V.
KeywordTwin strengthening Grain size strengthening Tensile properties Mg-Gd-Y alloy Multi-directionally impact forge
Funding OrganizationNational Natural Science Foundation of China ; National Science and Technology Major Project of China ; Natural Science Foundation of Liaoning Province
DOI10.1016/j.jmrt.2021.10.060
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[52171055] ; National Natural Science Foundation of China[51301173] ; National Natural Science Foundation of China[51601193] ; National Natural Science Foundation of China[51701218] ; National Science and Technology Major Project of China[2017ZX04014001] ; Natural Science Foundation of Liaoning Province[20180550799]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000717684300006
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167466
Collection中国科学院金属研究所
Corresponding AuthorYan, M.; Chen, R. S.
Affiliation1.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Lu, S. H.,Wu, D.,Yan, M.,et al. Effect of twin and grain size strengthening on tensile properties of a multi-directionally impact forged Mg-Gd-Y alloy[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2021,15:4502-4515.
APA Lu, S. H.,Wu, D.,Yan, M.,&Chen, R. S..(2021).Effect of twin and grain size strengthening on tensile properties of a multi-directionally impact forged Mg-Gd-Y alloy.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,15,4502-4515.
MLA Lu, S. H.,et al."Effect of twin and grain size strengthening on tensile properties of a multi-directionally impact forged Mg-Gd-Y alloy".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 15(2021):4502-4515.
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