Effects of Zr Content on Microstructure and Mechanical Properties of Mg-Al Magnesium Alloy

Huang Xiaofeng1; Liang Yan1; Cao Xijuan2; Zhu Kai2; Wang Tao2; Xie Rui1

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Effects of Zr Content on Microstructure and Mechanical Properties of Mg-Al Magnesium Alloy
Vol. 29, Issue 7, Pages: 660-662(2009)
Published： 2009 ，
DOI：

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[1]黄晓锋,梁艳,曹喜娟,朱凯,王韬,谢锐.Zr含量对Mg-5Zn-2Al镁合金组织与性能的影响[J].特种铸造及有色合金,2009,29(07):660-662+586.

Huang Xiaofeng1, Liang Yan1, Cao Xijuan2, et al. Effects of Zr Content on Microstructure and Mechanical Properties of Mg-Al Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 29(7):660-662(2009)
[1]黄晓锋,梁艳,曹喜娟,朱凯,王韬,谢锐.Zr含量对Mg-5Zn-2Al镁合金组织与性能的影响[J].特种铸造及有色合金,2009,29(07):660-662+586. DOI：

Huang Xiaofeng1, Liang Yan1, Cao Xijuan2, et al. Effects of Zr Content on Microstructure and Mechanical Properties of Mg-Al Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 29(7):660-662(2009) DOI：

摘要

采用光学显微镜及拉伸试验机等手段

研究了Zr含量对Mg-5Zn-2Al合金铸态和热处理后显微组织及力学性能的影响。结果表明

Zr的加入使Mg-5Zn-2Al镁合金的铸态和热处理后的晶粒得到明显的细化。在铸态及热处理条件下

合金的抗拉强度与伸长率均呈现先上升后下降的变化趋势。对于铸态合金而言

Zr含量为0.6%时

Mg-5Zn-2Al合金的晶粒最为细小

并且其抗拉强度与伸长率均达到最大值

为215MPa和12.563%。经热处理后

合金的抗拉强度较铸态得到了显著地提高。当Zr含量为0.6%时

合金的抗拉强度达到最大

为249MPa。

Abstract

Effects of Zr contents on microstructure and mechanical properties of as-cast and in heat treated Mg-5Zn-2Al magnesium alloy were investigated by OM （optical microscope） and tensile testing machine. The results verify that grain size in as-cast and in heat treated Mg-5Zn-2Al alloy can be remarkably refined with Zr addition. The tensile strength and elongation of the as-cast and heat treated alloy are firstly increased and then decreased. With 0.6% Zr addition

the desirable grain size in the as-cast alloy can be observed

and the tensile strength and elongation reach 215MPa and 12.563%

respectively. Compared with that of as-cast alloy

the tensile strength of the heat treated alloy is greatly improved with different Zr additions. With 0.6% Zr addition

the tensile strength of the heat treated alloy reaches 249MPa.