Microstructure and Mechanical Properties of ZA53 Mg Alloy in Sand Casting

Yang Guangyu Jie Wanqi Hao Qitang

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Microstructure and Mechanical Properties of ZA53 Mg Alloy in Sand Casting
Issue 11, (2005)
Published： 2005 ，
DOI：

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[1]杨光昱,介万奇,郝启堂.ZA53镁合金的砂型铸造组织和力学性能研究[J].特种铸造及有色合金,2005(11):20-22+4-5.

Yang Guangyu Jie Wanqi Hao Qitang. Microstructure and Mechanical Properties of ZA53 Mg Alloy in Sand Casting. [J]. Special Casting & Nonferrous Alloys (11).(2005)
[1]杨光昱,介万奇,郝启堂.ZA53镁合金的砂型铸造组织和力学性能研究[J].特种铸造及有色合金,2005(11):20-22+4-5. DOI：

Yang Guangyu Jie Wanqi Hao Qitang. Microstructure and Mechanical Properties of ZA53 Mg Alloy in Sand Casting. [J]. Special Casting & Nonferrous Alloys (11).(2005) DOI：

摘要

研究发现砂型铸造镁合金ZA53的主要相组成为δMg基体相和τ[Mg32（Al

Zn）49]化合物相

τ相以半连续网状沿δ相晶界分布。对ZA53合金进行的固溶处理试验发现

在335℃固溶17h淬火后

合金室温抗拉强度和塑性得到大幅提高。在343℃固溶17h淬火后

合金组织完全转变为单相固溶体

合金的室温力学性能较好

σb=245MPa

伸长率为12%

合金的拉伸断口形貌由混合型断口转变为韧性断口。

Abstract

As-cast microstructure of ZA53 Mg alloy in sand casting is mainly composed of δ-Mg matrix phase and τ[Mg

12（Al

Zn）

49]compound

in which semi-continuous network τ phase is distributed along δ-Mg matrix phase boundary. Tensile strength at room temperature and plasticity of the quenched alloy can be improved remarkably after solid solution at 335 ℃ for 17 hours. Mechanical properties of the quenched ZA53 alloy is σ

=245 MPa and δ= 12% and the fracture morphology transforms from mixed fracture to tough fracture due to microstructure fully transforming single solid solution phase after solid solution at 343℃for 17 h.