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Microstructure and mechanical property of dual-directional-extruded Mg alloy AZ31

机译：双向挤压镁合金AZ31的组织和力学性能

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摘要

We report microstructure evolution and mechanical property of Mg alloy AZ31 processed by a new deformation technique, dual-directional extrusion (DDE). Using optical microscopy, scanning electron microscopy, and electron back scatter diffraction technique, we attribute the significant refinement of original coarse grains in the DDE-processed alloy to the occurrence of dynamic recrystallization. Moreover, we find that low temperature is crucial for yielding fine grain, which consequently results in high micro-hardness and yield stress, large fracture strain, and enhanced elongation. The improved mechanical properties are comparable or even superior to those of the alloy subjected to other deformation techniques, rendering the DDE a promising way for further tailoring properties of Mg-based alloys.
机译：我们报告了通过新的变形技术双向挤压（DDE）处理的镁合金AZ31的组织演变和力学性能。使用光学显微镜，扫描电子显微镜和电子背散射衍射技术，我们将DDE处理的合金中原始粗晶粒的显着细化归因于动态再结晶的发生。此外，我们发现低温对于产生细晶粒至关重要，因此会导致较高的显微硬度和屈服应力，较大的断裂应变以及增强的伸长率。改进后的机械性能与经过其他变形技术的合金相当甚至更好，这使得DDE成为进一步定制Mg基合金性能的有前途的方法。

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  • 来源
    《Materials Science and Engineering》 |2010年第17期|P.4050-4055|共6页
  • 作者

    Liwei Lu; Tianmo Liu; Shan Jiang; Fushen Pan; Qing Liu; Zhongchang Wang;

  • 作者单位

    College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, PR China;

    rnCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, PR China;

    rnCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, PR China;

    rnCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, PR China;

    rnCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, PR China;

    rnWPI Research Center, Advanced Institute for Materials Research. Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;

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  • 正文语种 eng
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  • 关键词

    dual-directional extrusion; Mg alloy AZ31; microstructure; mechanical property; dynamic recrystallization;

    机译：双向挤压;镁合金AZ31;微观结构机械性能动态重结晶;

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