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Achieving High Strength and Good Ductility in As-Extruded Mg-Gd-Y-Zn Alloys by Ce Micro-Alloying
Gao, ZY; Hu, LS; Li, JF; An, ZG; Li, J; Huang, QY; Gao, ZY (reprint author), Chongqing Jiaotong Univ, Sch Mech & Automot Engn, Chongqing 400074, Peoples R China.; Huang, QY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2018
Source PublicationMATERIALS
ISSN1996-1944
Volume11Issue:1Pages:-
AbstractIn this study, the effect of Ce additions on microstructure evolution of Mg-7Gd-3.5Y-0.3Zn (wt %) alloys during the casting, homogenization, aging and extrusion processing are investigated, and novel mechanical properties are also obtained. The results show that Ce addition promotes the formation of long period stacking ordered (LPSO) phases in the as-cast Mg-Gd-Y-Zn-Ce alloys. A high content of Ce addition would reduce the maximum solubility of Gd and Y in the Mg matrix, which leads to the higher density of Mg12Ce phases in the as-homogenized alloys. The major second phases observed in the as-extruded alloys are micron-sized bulk LPSO phases, nano-sized stripe LPSO phases, and broken Mg12Ce and Mg5RE phases. Recrystallized grain size of the as-extruded 0.2Ce, 0.5Ce and 1.0Ce alloys can be refined to similar to 4.3 mu m, similar to 1.0 mu m and similar to 8.4 mu m, respectively, which is caused by the synthesized effect of both micron phases and nano phases. The strength and ductility of as-extruded samples firstly increase and then decrease with increasing Ce content. As-extruded 0.5Ce alloy exhibits optimal mechanical properties, with ultimate strength of 365 MPa and ductility of similar to 15% simultaneously.; In this study, the effect of Ce additions on microstructure evolution of Mg-7Gd-3.5Y-0.3Zn (wt %) alloys during the casting, homogenization, aging and extrusion processing are investigated, and novel mechanical properties are also obtained. The results show that Ce addition promotes the formation of long period stacking ordered (LPSO) phases in the as-cast Mg-Gd-Y-Zn-Ce alloys. A high content of Ce addition would reduce the maximum solubility of Gd and Y in the Mg matrix, which leads to the higher density of Mg12Ce phases in the as-homogenized alloys. The major second phases observed in the as-extruded alloys are micron-sized bulk LPSO phases, nano-sized stripe LPSO phases, and broken Mg12Ce and Mg5RE phases. Recrystallized grain size of the as-extruded 0.2Ce, 0.5Ce and 1.0Ce alloys can be refined to similar to 4.3 mu m, similar to 1.0 mu m and similar to 8.4 mu m, respectively, which is caused by the synthesized effect of both micron phases and nano phases. The strength and ductility of as-extruded samples firstly increase and then decrease with increasing Ce content. As-extruded 0.5Ce alloy exhibits optimal mechanical properties, with ultimate strength of 365 MPa and ductility of similar to 15% simultaneously.
description.department[gao, zhengyuan ; hu, linsheng ; li, jinfeng ; an, zhiguo ; li, jun] chongqing jiaotong univ, sch mech & automot engn, chongqing 400074, peoples r china ; [huang, qiuyan] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china
KeywordWrought Magnesium Alloys Mechanical-properties Microstructure Evolution Lpso Phase Sn Alloys Deformation Ca
Subject AreaMaterials Science, Multidisciplinary
Funding OrganizationProject of National Nature Science Foundation of China [51401178, 51701211]; Scientific and Technological Research Program of Nanchuan in Chongqing [CX201407]; Scientific and Technological Research Program of Chongqing Jiaotong University [16JDKJC-A005]; Chongqing Research Program of Basic Research and Frontier Technology [CSTC2015JCYJBX0140]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79598
Collection中国科学院金属研究所
Corresponding AuthorGao, ZY (reprint author), Chongqing Jiaotong Univ, Sch Mech & Automot Engn, Chongqing 400074, Peoples R China.; Huang, QY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Gao, ZY,Hu, LS,Li, JF,et al. Achieving High Strength and Good Ductility in As-Extruded Mg-Gd-Y-Zn Alloys by Ce Micro-Alloying[J]. MATERIALS,2018,11(1):-.
APA Gao, ZY.,Hu, LS.,Li, JF.,An, ZG.,Li, J.,...&Huang, QY .(2018).Achieving High Strength and Good Ductility in As-Extruded Mg-Gd-Y-Zn Alloys by Ce Micro-Alloying.MATERIALS,11(1),-.
MLA Gao, ZY,et al."Achieving High Strength and Good Ductility in As-Extruded Mg-Gd-Y-Zn Alloys by Ce Micro-Alloying".MATERIALS 11.1(2018):-.
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