Microstructure and Properties of Mg-Sn-Zn-Al Alloy Modified by Sliding Friction Treatment

Bi Guangli; Wang Yashuo; Jiang Jing; Li Yuandong; Chen Tijun; Zhang Yusheng; Ma Ying

doi:10.15980/j.tzzz.2021.06.002

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Microstructure and Properties of Mg-Sn-Zn-Al Alloy Modified by Sliding Friction Treatment
Vol. 41, Issue 6, Pages: 668-675(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.06.002

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[1]毕广利,王亚硕,姜静,李元东,陈体军,张于胜,马颖.滑动摩擦加工Mg-Sn-Zn-Al合金的组织和性能[J].特种铸造及有色合金,2021,41(06):668-675.

Bi Guangli, Wang Yashuo, Jiang Jing, et al. Microstructure and Properties of Mg-Sn-Zn-Al Alloy Modified by Sliding Friction Treatment. [J]. Special Casting & Nonferrous Alloys 41(6):668-675(2021)
[1]毕广利,王亚硕,姜静,李元东,陈体军,张于胜,马颖.滑动摩擦加工Mg-Sn-Zn-Al合金的组织和性能[J].特种铸造及有色合金,2021,41(06):668-675. DOI： 10.15980/j.tzzz.2021.06.002.

Bi Guangli, Wang Yashuo, Jiang Jing, et al. Microstructure and Properties of Mg-Sn-Zn-Al Alloy Modified by Sliding Friction Treatment. [J]. Special Casting & Nonferrous Alloys 41(6):668-675(2021) DOI： 10.15980/j.tzzz.2021.06.002.

摘要

利用滑动摩擦加工（SFT）方法对挤压Mg-7Sn-5Zn-3Al合金进行表面改性

研究了SFT合金的显微组织、力学和腐蚀性能。结果发现

SFT后

合金表层的晶粒显著细化

第二相体积分数明显减少且分布弥散。拉伸测试结果表明

SFT合金显示了优异的力学性能

其屈服强度、极限抗拉强度和伸长率分别为181 MPa、366 MPa和18.1%。SFT方法对合金的耐蚀性改善明显

呈现了低的平均腐蚀速率（4.51 mm/a）和腐蚀电流密度（197.2μA/cm

）

这主要与晶粒细化、第二相体积分数的减少以及弥散分布有关。

Abstract

Microstructure

mechanical and corrosion properties of as-extruded Mg-7 Sn-5 Zn-3 Al alloy modified by sliding friction treatment（SFT） were investigated. After SFT

the grain in the surface layer of the alloy is significantly refined and the volume fraction of second phase is remarkly reduced with its dispersed distribution. Tensile testing results indicate that the SFT exhibits excellent mechanical properties

whose yield strength

ultimate tensile strength and elongation are 181 MPa

366 MPa and 18.1%

respectively. The corrosion resistance of SFT alloy is significantly improved

presenting a low average corrosion rate（4.51 mm/a） and corrosion current density（197.2 μA/cm

）

which is mainly related to the grain refinement

small amount of the second phase and dispersed distribution.