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Enhancing mechanical properties of AZ61 magnesium alloy via friction stir processing: Effect of processing parameters

机译：通过摩擦搅拌加工增强AZ61镁合金的机械性能：加工参数的影响

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摘要

The purpose of this study was to modify the microstructure and mechanical properties of AZ61 cast magnesium alloy via solid-state friction stir processing (FSP). The effect of processing parameters on the microstructural evolution, texture and mechanical behavior was investigated. The results indicate that FSP was capable of producing fine-grained AZ61 magnesium alloy through dynamic recrystallization, and eliminating the unfavorable network-like large β-Mg_(17)Al_(12) particles present along the grain boundaries in the cast magnesium alloy. With increasing ratio of rotation rate to traverse speed, the grain size and fraction of high-angle grain boundaries (HAGBs) increased. Compared with the original cast alloy, the microhardness and tensile properties of FSP specimens were significantly enhanced. The high strength and ductility of FSP specimens were achieved mainly due to the scattered distribution of crystallographic texture and the effective grain refinement along with a larger fraction of HAGBs.
机译：本研究的目的是通过固态摩擦搅拌加工（FSP）来改变AZ61浇铸镁合金的微观结构和机械性能。研究了处理参数对微观结构演化，质地和力学行为的影响。结果表明，FSP能够通过动态再结晶产生细晶粒AZ61镁合金，并消除沿铸造镁合金中的晶界存在的不利网络状大的大β-Mg_（17）Al_（12）颗粒。随着旋转速率的增加与横向速度的比率，高角度晶界（HAGBS）的晶粒尺寸和分数增加。与原始铸造合金相比，FSP样品的显微硬度和拉伸性能显着提高。 FSP标本的高强度和延展性主要是由于散射的晶体纹理和有效晶粒细化的分布以及较大的牙龈分布。

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  • 来源
    《Materials Science and Engineering》 |2020年第21期|139945.1-139945.8|共8页
  • 作者

    X.C. Luo; L.M. Kang; H.L. Liu; Z.J. Li; Y.F. Liu; D.T. Zhang; D.L. Chen;

  • 作者单位

    School of Electrical and Mechanical Engineering Guangzhou Railway Polytechnic Guangzhou 510430 China;

    School of Electrical and Mechanical Engineering Guangzhou Railway Polytechnic Guangzhou 510430 China;

    School of Electrical and Mechanical Engineering Guangzhou Railway Polytechnic Guangzhou 510430 China;

    School of Electrical and Mechanical Engineering Guangzhou Railway Polytechnic Guangzhou 510430 China;

    School of Electrical and Mechanical Engineering Guangzhou Railway Polytechnic Guangzhou 510430 China;

    Key Laboratory for Advanced Metallic Materials Processing South China University of Technology Guangzhou 510640 China;

    Department of Mechanical and Industrial Engineering Ryerson University 350 Victoria Street Toronto ON MSB 2K3 Canada;

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  • 正文语种 eng
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  • 关键词

    Friction stir processing; Magnesium alloy; Processing parameter; Microstructural evolution; Mechanical properties;

    机译：摩擦搅拌加工;镁合金;处理参数;微观结构演变;机械性能;

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