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Reasonable utilization of {10-12} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy
Lu, S. H.1,2; Wu, D.1; Chen, R. S.1; Han, En-Hou1
Corresponding AuthorWu, D.(dwu@imr.ac.cn) ; Chen, R. S.(rschen@imr.ac.cn)
2020-06-01
Source PublicationMATERIALS & DESIGN
ISSN0264-1275
Volume191Pages:21
AbstractDuring the deformation of Mg alloys, {10-12} extension twin, as one of the most active deformation mechanisms, contributed much to the formation of basal texture, yet little to dynamic recrystallization (DRX) grains, i.e., effective grain refinement. In this work, {10-12} extension twin had been creatively utilized to achieve grain refinement and property improvement in a Mg-Gd-Y alloy by multi-directional impact forging (MDIF). Firstly, flourishing {10-12} extension twins divided the parent grain into many fine independent regions (similar to 10 mu m). Meanwhile, a large number of twin boundaries were pinning mainly by interaction with neighboring dislocations in twin or matrix. Secondly, those pinned twin boundaries can effectively accumulate dislocation slips and promote the formation of extensive low angle grain boundaries (LAGBs). These high densities of LAGBs can further subdivide the independent regions provided by extension twins into micro-regions (similar to 5 mu m). Thirdly, those fine micro-regions developed to be DRX after a dynamic recovery. Finally, we obtained a yield isotropy high-strength Mg alloy with an ultimate tensile strength of 354 MPa after MDIF of 110 passes. This work proposed a brand new insight to prepare wrought Mg alloy with fine grain, yet without strong texture, which is beneficial to better formability and mechanical property isotropy. (C) 2020 The Authors. Published by Elsevier Ltd.
KeywordMg alloy Forging Twin DRX Texture
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China (NSFC) ; National Science and Technology Major Project of China ; Natural Science Foundation of Liaoning province
DOI10.1016/j.matdes.2020.108600
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFB0301104] ; National Natural Science Foundation of China (NSFC)[51531002] ; National Natural Science Foundation of China (NSFC)[51301173] ; National Natural Science Foundation of China (NSFC)[51601193] ; National Natural Science Foundation of China (NSFC)[51701218] ; National Science and Technology Major Project of China[2017ZX04014001] ; Natural Science Foundation of Liaoning province[20180550799]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000536937200022
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/139165
Collection中国科学院金属研究所
Corresponding AuthorWu, D.; Chen, R. S.
Affiliation1.Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Lu, S. H.,Wu, D.,Chen, R. S.,et al. Reasonable utilization of {10-12} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy[J]. MATERIALS & DESIGN,2020,191:21.
APA Lu, S. H.,Wu, D.,Chen, R. S.,&Han, En-Hou.(2020).Reasonable utilization of {10-12} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy.MATERIALS & DESIGN,191,21.
MLA Lu, S. H.,et al."Reasonable utilization of {10-12} twin for optimizing microstructure and improving mechanical property in a Mg-Gd-Y alloy".MATERIALS & DESIGN 191(2020):21.
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