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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.
2018
Source PublicationSTRENGTH OF MATERIALS
ISSN0039-2316
Volume50Issue:1Pages:184-192
AbstractMg-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.
description.department[sheng, l. y. ; du, b. n. ; wang, b. j. ; lai, c. ; xi, t. f.] peking univ, shenzhen inst, shenzhen, peoples r china ; [xu, d. k.] chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang, liaoning, peoples r china ; [gao, y.] zunyi med coll, dept stomatol, longgang dist cent hosp, shenzhen, guangdong, peoples r china
KeywordHigh-temperature Synthesis Eutectic Alloy Magnesium Alloy Texture Ductility
Subject AreaMaterials Science, Characterization & Testing
Funding OrganizationShenzhen Technology Innovation Plan [CXZZ20140731091722497, CXZZ20140419114548507]; Strategic New Industry Development Special Foundation of Shenzhen [JCYJ20150529162228734, JCYJ20160427100211076, JCYJ20170306141749970, JCYJ20160329161539885, JCYJ 20150625155931806, JCYJ20160427170611414]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79595
Collection中国科学院金属研究所
Corresponding AuthorSheng, LY (reprint author), Peking Univ, Shenzhen Inst, Shenzhen, Peoples R China.
Recommended Citation
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.
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