Hot Extrusion Effect on the Microstructure and Mechanical Properties of a Mg-Y-Nd-Zr Alloy

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	Hot Extrusion Effect on the Microstructure and Mechanical Properties of a Mg-Y-Nd-Zr Alloy
	Sheng, LY; Du, BN; Wang, BJ; Xu, DK; Lai, C; Gao, Y; Xi, TF; Sheng, LY (reprint author), Peking Univ, Shenzhen Inst, Shenzhen, Peoples R China.
刊名	STRENGTH OF MATERIALS
	2018
卷号	50 期号:1 页码:184-192
关键词	High-temperature Synthesis Eutectic Alloy Magnesium Alloy Texture Ductility
ISSN号	0039-2316
英文摘要	Mg-Zn-Y-Nd alloy was prepared by casting and hot extrusion. The microstructure and mechanical properties of OM, SEM, XRD, TEM, and tensile tests were investigated with casting and hot extruded alloys. The results demonstrate that in a casting Mg-Y-Nd-Zr alloy, the alpha-Mg matrix is separated into the cell structure by a discontinuously distributed coarse Mg24Y5/alpha-Mg eutectic structure and fine Mg12Nd particles. TEM analysis shows that the Mg12Nd and Mg24Y5 phases have the orientation of , and and , respectively. The hot extrusion separates the Mg24Y5/alpha-Mg eutectic structure into fragments and aligns fragmentary Mg24Y5 particles along the extrusion direction. The interaction of hot extrusion and strengthening particles refines the alpha-Mg matrix greatly. Moreover, large strains result in the stacking faults of the matrix. As compared to the casting alloy, the hot-extruded one exhibits high yield strength, ultimate tensile strength, and elongation, which should be ascribed to the grain fineness, optimum distribution of strengthening particles and multiple substructures.; Mg-Zn-Y-Nd alloy was prepared by casting and hot extrusion. The microstructure and mechanical properties of OM, SEM, XRD, TEM, and tensile tests were investigated with casting and hot extruded alloys. The results demonstrate that in a casting Mg-Y-Nd-Zr alloy, the alpha-Mg matrix is separated into the cell structure by a discontinuously distributed coarse Mg24Y5/alpha-Mg eutectic structure and fine Mg12Nd particles. TEM analysis shows that the Mg12Nd and Mg24Y5 phases have the orientation of , and and , respectively. The hot extrusion separates the Mg24Y5/alpha-Mg eutectic structure into fragments and aligns fragmentary Mg24Y5 particles along the extrusion direction. The interaction of hot extrusion and strengthening particles refines the alpha-Mg matrix greatly. Moreover, large strains result in the stacking faults of the matrix. As compared to the casting alloy, the hot-extruded one exhibits high yield strength, ultimate tensile strength, and elongation, which should be ascribed to the grain fineness, optimum distribution of strengthening particles and multiple substructures.
学科主题	Materials Science, Characterization & Testing
语种	英语
资助机构	Shenzhen Technology Innovation Plan [CXZZ20140731091722497, CXZZ20140419114548507]; Strategic New Industry Development Special Foundation of Shenzhen [JCYJ20150529162228734, JCYJ20160427100211076, JCYJ20170306141749970, JCYJ20160329161539885, JCYJ 20150625155931806, JCYJ20160427170611414]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79595]
专题	金属研究所_中国科学院金属研究所
通讯作者	Sheng, LY (reprint author), Peking Univ, Shenzhen Inst, Shenzhen, Peoples R China.
推荐引用方式 GB/T 7714	Sheng, LY,Du, BN,Wang, BJ,et al. Hot Extrusion Effect on the Microstructure and Mechanical Properties of a Mg-Y-Nd-Zr Alloy[J]. STRENGTH OF MATERIALS,2018,50(1):184-192.
APA	Sheng, LY.,Du, BN.,Wang, BJ.,Xu, DK.,Lai, C.,...&Sheng, LY .(2018).Hot Extrusion Effect on the Microstructure and Mechanical Properties of a Mg-Y-Nd-Zr Alloy.STRENGTH OF MATERIALS,50(1),184-192.
MLA	Sheng, LY,et al."Hot Extrusion Effect on the Microstructure and Mechanical Properties of a Mg-Y-Nd-Zr Alloy".STRENGTH OF MATERIALS 50.1(2018):184-192.