Effects of Ag on Microstructure and Mechanical Properties of Mg-4Zn-0.5Sr Alloy

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Gao Zhixian, Bian Jiancong, Chen Bin, et al. Effects of Ag on Microstructure and Mechanical Properties of Mg-4Zn-0.5Sr Alloy. [J]. Special Casting & Nonferrous Alloys 42(8):996-999(2022)
DOI：

Gao Zhixian, Bian Jiancong, Chen Bin, et al. Effects of Ag on Microstructure and Mechanical Properties of Mg-4Zn-0.5Sr Alloy. [J]. Special Casting & Nonferrous Alloys 42(8):996-999(2022) DOI： 10.15980/j.tzzz.2022.08.015.

研究了Ag含量对Mg-4Zn-0.5Sr合金组织与性能的影响。通过光学显微镜(OM)、扫描电镜(SEM)、万能试验机、X射线衍射仪(XRD)和能谱仪对合金的显微组织、拉伸断口形貌、力学性能和物相进行分析。结果表明，合金组织主要由基体α-Mg、晶界上错落分布的点状MgZn相、长条状的Mg

相和短粗状Mg

Ag相组成。随着Ag含量增加，合金晶粒尺寸先增大后减小，力学性能呈现先增加后减小的趋势。当Ag含量为0.5%时，合金晶粒尺寸最小，为83.28μm

此时合金的抗拉强度达到182 MPa

屈服强度为102 MPa

伸长率为13.81%。

The effects of Ag content on microstructure and properties of Mg-4 Zn-0.5 Sr alloys were investigated. The microstructure

tensile fracture morphology

mechanical properties and phase of the alloy were analyzed by optical microscope（OM）

scanning electron microscope（SEM）

universal testing machine

X-ray diffraction（XRD） and energy dispersive spectrometer. The results show that the microstructure of the alloy is mainly composed of α-Mg matrix

dotted MgZn phase of staggered distribution

elongated Mg

phase and short coarse Mg

Ag phase distributed at grain boundaries. With the increase of Ag content

the grain size of the alloy is increased firstly and then decreased

and the mechanical properties of the alloy is increased firstly and then decreased. When Ag content is 0.5%

the grain size of the alloy reaches 83.28 μm

and the alloy presents desirable mechanical properties with maximum tensile strength of 182 MPa

yield strength of 102 MPa and elongation of 13.81%.

镁合金Ag显微组织力学性能

Magnesium AlloyAgMicrostructureMechanical Properties

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