Effects of Yttrium on Microstructure and Mechanical Properties of Mg-Zn Alloys

Yuan Weihua1; Zhang Xingjun1; Yang Shuqi1; Liu Zili2

Views : 0 下载量: 199 CSCD: 4

Export
Share
Collection
Album

Effects of Yttrium on Microstructure and Mechanical Properties of Mg-Zn Alloys
Issue 8, Pages: 649-650(2008)
Published： 2008 ，
DOI：

扫描看全文

[1]袁卫华,张兴军,杨淑启,刘子利.Y对Mg-Zn合金组织和力学性能的影响[J].特种铸造及有色合金,2008(08):649-650+574.

Yuan Weihua1, Zhang Xingjun1, Yang Shuqi1, et al. Effects of Yttrium on Microstructure and Mechanical Properties of Mg-Zn Alloys. [J]. Special Casting & Nonferrous Alloys (8):649-650(2008)
[1]袁卫华,张兴军,杨淑启,刘子利.Y对Mg-Zn合金组织和力学性能的影响[J].特种铸造及有色合金,2008(08):649-650+574. DOI：

Yuan Weihua1, Zhang Xingjun1, Yang Shuqi1, et al. Effects of Yttrium on Microstructure and Mechanical Properties of Mg-Zn Alloys. [J]. Special Casting & Nonferrous Alloys (8):649-650(2008) DOI：

摘要

在7.5kW的坩埚电阻炉中制备了Y质量分数分别为1.5%、3.0%、6.0%的3种Mg-3Zn合金试样

分析讨论了Y在合金中的存在形式和作用机制。随着Y含量的提高

合金的二次相由I相+W相过渡到W相+H相

合金的组织结构有粗化的趋势

晶间组织的形态也由细线状向网状转变。测试了合金的力学性能

结果发现

当Y含量从1.5%提高到3.0%时

合金的屈服强度、冲击韧度和硬度分别提高了56.6%、7.6%和27.4%

而伸长率降低了11.8%。但当Y含量达到6.0%时

合金的屈服强度和硬度仍有所提高

但冲击韧度却有所下降。

Abstract

Mg-3Zn magnesium alloys with 1.5%

3.0% and 6.0% Y addition were prepared in crucible furnace with 7.5 kW. Effects of Y addition on microstructure and properties of Mg-3Zn alloy have been described. With increasing in Y addition

the secondary phase in the alloy is transformed from I phase +W phase into W phase +H phase

and the microstructure of the alloy gradually becomes coarse

in which the structure morphology is changed from needle-like into network structure. Meanwhile

with the increase of Y addition

the tensile strength

hardness

impact toughness are increased with the decrease of plasticity

however

with Y addition more than 6%

impacting toughness of the alloy is slightly declined.