Mg-Zn-Gd-Nd合金的微观组织与力学性能

冯晓伟; 冯波; 王娟; 龙骏; 秦笑; 王海艳

doi:10.15980/j.tzzz.2019.11.001

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Mg-Zn-Gd-Nd合金的微观组织与力学性能
Microstructure and Mechanical Properties of Mg-Zn-Gd-Nd Alloy
2019年39卷第11期页码：1161-1164
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.11.001

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[1]冯晓伟,冯波,王娟,龙骏,秦笑,王海艳.Mg-Zn-Gd-Nd合金的微观组织与力学性能[J].特种铸造及有色合金,2019,39(11):1161-1164.

Feng Xiaowei, Feng Bo, Wang Juan, et al. Microstructure and Mechanical Properties of Mg-Zn-Gd-Nd Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(11):1161-1164.
[1]冯晓伟,冯波,王娟,龙骏,秦笑,王海艳.Mg-Zn-Gd-Nd合金的微观组织与力学性能[J].特种铸造及有色合金,2019,39(11):1161-1164. DOI： 10.15980/j.tzzz.2019.11.001.

Feng Xiaowei, Feng Bo, Wang Juan, et al. Microstructure and Mechanical Properties of Mg-Zn-Gd-Nd Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(11):1161-1164. DOI： 10.15980/j.tzzz.2019.11.001.

摘要

通过光学显微镜（OM）、扫描电镜（SEM）等方法

研究了Gd、Nd添加对铸态、挤压态Mg-3Zn合金的微观组织的影响

并测试了其室温拉伸力学性能。结果表明

Gd、Nd能显著细化Mg-3Zn合金的铸态组织

晶粒中含有大量的第二相。经挤压后组织得到细化

且含有大量的再结晶晶粒

第二相粒子沿挤压方向呈纤维状分布。随着Gd、Nd的加入

合金的抗拉强度和屈服强度显著提升

最大分别为265MPa、225MPa

伸长率降低。

Abstract

The effects of Gd and Nd addition on the microstructure evolution of the as-cast and as-extruded Mg-3Zn alloy were investigated by optical microscopy（OM）and scanning electron microscopy（SEM）.The tensile mechanical properties of the alloy at room temperature were tested.The results show that the as-cast microstructure of Mg-3Zn alloy can be refined significantly with addition of Gd and Nd

and a large number of second phases can be observed in the microstructure.The microstructure of the extruded alloy is refined with a large amount of recrystallized crystals

and the second phase particles are distributed in a fiber shape along the extrusion direction.With the addition of Gd and Nd

the tensile strength and yield strength of the Mg-3Zn alloy are improved significantly.The maximum value reach 265 MPa and 225 MPa

respectively

while the change of elongation can be decreased.