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Effect of Icosahedral Phase on Crystallographic Texture and Mechanical Anisotropy of Mg-4%Li Based Alloys
Li, C. Q.; Xu, D. K.; Yu, S.; Sheng, L. Y.; Han, E. H.; Xu, DK (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China.
2017-05-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume33Issue:5Pages:475-480
AbstractThrough investigating and comparing the microstructure and mechanical properties of the as-extruded Mg alloys Mg-4%Li and Mg-4%Li-6%Zn-1.2%Y (in wt%), it demonstrates that although the formation of I-phase (Mg3Zn6Y, icosahedral structure) could weaken the crystallographic texture and improve the mechanical strength, the mechanical anisotropy in terms of strength remains in Mg-4%Li-6%Zn-1.2%Y alloy. Failure analysis indicates that for the Mg-4%Li alloy, the fracture surfaces of the tensile samples tested along transverse direction (TD) contain a large number of plastic dimples, whereas the fracture surface exhibits quasi-cleavage characteristic when tensile samples were tested along extrusion direction (ED). For the Mg-4%Li-6%Zn-1.2%Y alloy, typical ductile fracture surfaces can be observed in both "TD" and "ED" samples. Moreover, due to the zonal distribution of broken I-phase particles, the fracture surface of "TD" samples is characterized by the typical "woody fracture". Copyright (C) 2017, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.; Through investigating and comparing the microstructure and mechanical properties of the as-extruded Mg alloys Mg-4%Li and Mg-4%Li-6%Zn-1.2%Y (in wt%), it demonstrates that although the formation of I-phase (Mg3Zn6Y, icosahedral structure) could weaken the crystallographic texture and improve the mechanical strength, the mechanical anisotropy in terms of strength remains in Mg-4%Li-6%Zn-1.2%Y alloy. Failure analysis indicates that for the Mg-4%Li alloy, the fracture surfaces of the tensile samples tested along transverse direction (TD) contain a large number of plastic dimples, whereas the fracture surface exhibits quasi-cleavage characteristic when tensile samples were tested along extrusion direction (ED). For the Mg-4%Li-6%Zn-1.2%Y alloy, typical ductile fracture surfaces can be observed in both "TD" and "ED" samples. Moreover, due to the zonal distribution of broken I-phase particles, the fracture surface of "TD" samples is characterized by the typical "woody fracture". Copyright (C) 2017, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.
description.department[li, c. q.] northeastern univ, sch mat sci & engn, shenyang 110819, peoples r china ; [li, c. q. ; xu, d. k. ; yu, s. ; han, e. h.] chinese acad sci, inst met res, cas key lab nucl mat & safety assessment, shenyang 110016, peoples r china ; [yu, s.] shenyang aerosp univ, sch mat sci & engn, shenyang 110136, peoples r china ; [sheng, l. y.] peking univ, shenzhen inst, shenzhen key lab human tissue regenerate & repair, shenzhen 518057, peoples r china
KeywordMg-li Alloy Texture Mechanical Anisotropy Fracture
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51271183, 51171192, 51301172]; National Basic Research Program of China (973 Program) [2013CB632205]; National Key Research and Development Program of China project [2016YFB0301105]; Shenzhen Technology Innovation Plan [CXZZ20140419114548507, CXZZ20140731091722497]; Shenzhen Basic Research Project [JCYJ20150529162228734]; Innovation Fund of Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS)
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78152
Collection中国科学院金属研究所
Corresponding AuthorXu, DK (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Li, C. Q.,Xu, D. K.,Yu, S.,et al. Effect of Icosahedral Phase on Crystallographic Texture and Mechanical Anisotropy of Mg-4%Li Based Alloys[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2017,33(5):475-480.
APA Li, C. Q.,Xu, D. K.,Yu, S.,Sheng, L. Y.,Han, E. H.,&Xu, DK .(2017).Effect of Icosahedral Phase on Crystallographic Texture and Mechanical Anisotropy of Mg-4%Li Based Alloys.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,33(5),475-480.
MLA Li, C. Q.,et al."Effect of Icosahedral Phase on Crystallographic Texture and Mechanical Anisotropy of Mg-4%Li Based Alloys".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 33.5(2017):475-480.
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