Achieving High Strength and Good Ductility in As-Extruded Mg-Gd-Y-Zn Alloys by Ce Micro-Alloying

IMR OpenIR

	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
发表期刊	MATERIALS
ISSN	1996-1944
卷号	11 期号:1 页码:-
摘要	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.; 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.
部门归属	[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
关键词	Wrought Magnesium Alloys Mechanical-properties Microstructure Evolution Lpso Phase Sn Alloys Deformation Ca
学科领域	Materials Science, Multidisciplinary
资助者	Project 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]
收录类别	SCI
语种	英语
WOS记录号	WOS:000427764000102
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79598
专题	中国科学院金属研究所
通讯作者	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.
推荐引用方式 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):-.