Effects of Zn on Microstructure and Mechanical Properties of As-cast Mg-Y-Nd-Zr Alloys

Effects of Zn on microstructure and mechanical properties of Mg-Y-Nd-Zr as-cast alloys were investigated by the optical microscopy(OM), scanning electron microscopy(SEM), X-ray diffractometry(XRD) and the mechanical properties test. The results show that the grain size of Mg-Y-Nd-Zr-<i>x</i...

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Main Authors: SU Zai-jun, YANG Shu-zhong, LIU Chu-ming, YANG Xin-hua, LIU Xian-lan
Format: Article
Language:zho
Published: Journal of Materials Engineering 2017-09-01
Series:Cailiao gongcheng
Subjects:
Online Access:http://jme.biam.ac.cn/CN/Y2017/V45/I9/116
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author SU Zai-jun
YANG Shu-zhong
LIU Chu-ming
YANG Xin-hua
LIU Xian-lan
author_facet SU Zai-jun
YANG Shu-zhong
LIU Chu-ming
YANG Xin-hua
LIU Xian-lan
author_sort SU Zai-jun
collection DOAJ
description Effects of Zn on microstructure and mechanical properties of Mg-Y-Nd-Zr as-cast alloys were investigated by the optical microscopy(OM), scanning electron microscopy(SEM), X-ray diffractometry(XRD) and the mechanical properties test. The results show that the grain size of Mg-Y-Nd-Zr-<i>x</i>Zn(<i>x</i>=0.0%, 0.5%, 1.0%, 1.5%,mass fraction)alloys is greatly refined with the increase of Zn content, which is refined from (57&#177;0.8)μm to (30&#177;0.3)μm. The volume fraction of eutectic structure at grain boundary increases gradually. Mg<sub>12</sub>Nd phase and Mg<sub>24</sub>Y<sub>5</sub> phase exist mainly in Mg-Y-Nd-Zr as-cast alloy. With the addition of 0.5%Zn, Mg<sub>12</sub>YZn phase appears at the grain boundary. With the increase of Zn, the volume fraction of Mg<sub>12</sub>YZn phase and the mechanical properties of the alloys increases gradually. The alloy containing 1.0%Zn exhibits the optimal mechanical properties, the ultimate tensile strength, yield strength and elongation are (208&#177;5.9), (159&#177;3.9)MPa and (7.5&#177;0.2)%, respectively; comparing with the alloy without the addition of Zn, the ultimate tensile strength, yield strength and elongation increase by 18, 42MPa and 1.2%.
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spelling doaj.art-55af4ebc8dcb46ac81a7d9848c8c98022023-01-02T21:46:48ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812017-09-0145911612210.11868/j.issn.1001-4381.2015.000649201709000649Effects of Zn on Microstructure and Mechanical Properties of As-cast Mg-Y-Nd-Zr AlloysSU Zai-jun0YANG Shu-zhong1LIU Chu-ming2YANG Xin-hua3LIU Xian-lan4Department of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422000, Hunan, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaDepartment of Mechanical Engineering, Hunan Institute of Technology, Hengyang 421002, Hunan, ChinaEffects of Zn on microstructure and mechanical properties of Mg-Y-Nd-Zr as-cast alloys were investigated by the optical microscopy(OM), scanning electron microscopy(SEM), X-ray diffractometry(XRD) and the mechanical properties test. The results show that the grain size of Mg-Y-Nd-Zr-<i>x</i>Zn(<i>x</i>=0.0%, 0.5%, 1.0%, 1.5%,mass fraction)alloys is greatly refined with the increase of Zn content, which is refined from (57&#177;0.8)μm to (30&#177;0.3)μm. The volume fraction of eutectic structure at grain boundary increases gradually. Mg<sub>12</sub>Nd phase and Mg<sub>24</sub>Y<sub>5</sub> phase exist mainly in Mg-Y-Nd-Zr as-cast alloy. With the addition of 0.5%Zn, Mg<sub>12</sub>YZn phase appears at the grain boundary. With the increase of Zn, the volume fraction of Mg<sub>12</sub>YZn phase and the mechanical properties of the alloys increases gradually. The alloy containing 1.0%Zn exhibits the optimal mechanical properties, the ultimate tensile strength, yield strength and elongation are (208&#177;5.9), (159&#177;3.9)MPa and (7.5&#177;0.2)%, respectively; comparing with the alloy without the addition of Zn, the ultimate tensile strength, yield strength and elongation increase by 18, 42MPa and 1.2%.http://jme.biam.ac.cn/CN/Y2017/V45/I9/116Mg-Y-Nd-Zr alloyZnmicrostructuremechanical property
spellingShingle SU Zai-jun
YANG Shu-zhong
LIU Chu-ming
YANG Xin-hua
LIU Xian-lan
Effects of Zn on Microstructure and Mechanical Properties of As-cast Mg-Y-Nd-Zr Alloys
Cailiao gongcheng
Mg-Y-Nd-Zr alloy
Zn
microstructure
mechanical property
title Effects of Zn on Microstructure and Mechanical Properties of As-cast Mg-Y-Nd-Zr Alloys
title_full Effects of Zn on Microstructure and Mechanical Properties of As-cast Mg-Y-Nd-Zr Alloys
title_fullStr Effects of Zn on Microstructure and Mechanical Properties of As-cast Mg-Y-Nd-Zr Alloys
title_full_unstemmed Effects of Zn on Microstructure and Mechanical Properties of As-cast Mg-Y-Nd-Zr Alloys
title_short Effects of Zn on Microstructure and Mechanical Properties of As-cast Mg-Y-Nd-Zr Alloys
title_sort effects of zn on microstructure and mechanical properties of as cast mg y nd zr alloys
topic Mg-Y-Nd-Zr alloy
Zn
microstructure
mechanical property
url http://jme.biam.ac.cn/CN/Y2017/V45/I9/116
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