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Influence of large cold strain on the microstructural evolution for a magnesium alloy subjected to multi-pass cold drawing

机译：大冷应变对镁合金多道次冷拔后组织演变的影响

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摘要

Cold-drawn AZ31 Mg alloy wires with a wide range of strains up to ～ 1.2 were prepared by multi-pass cold drawing to investigate the influence of cold strain on microstructural evolution. With the drawing, plastic deformation was initially dominated by twinning, particularly {10-10} twinning, but gradually becoming by slips especially after twinning was exhausted at large strains ＞ 1. More importantly, pronounced refined crystallites with diameter ～ 100 nm were achieved through profuse intersections across twin bundles starting from strains larger than ～ 0.6, and contributed to the weakening of {0002} fiber texture. This refinement could be interpreted as twin fragmentation related to dynamic recovery; and to some extent it implied a possibility of fabrication of ultrafine-grained structure by cold severe plastic deformation for magnesium alloys.
机译：通过多道次冷拔法制备了应变范围高达〜1.2的冷拔AZ31镁合金线材，研究了冷应变对组织演变的影响。在该图中，塑性变形最初主要由孪晶控制，尤其是{10-10}孪晶，但逐渐由滑移变为塑性，尤其是在以大于1的大应变耗尽孪晶之后。大于〜0.6的应变开始在双束中形成大量交叉，并导致{0002}纤维质地的减弱。这种改进可以解释为与动态恢复有关的孪生碎片。在某种程度上暗示了通过冷严重塑性变形使镁合金制造超细晶粒结构的可能性。

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  • 来源
    《Materials Science and Engineering》 |2015年第19期|92-96|共5页
  • 作者

    W.Z. Chen; W.C. Zhang; H.Y. Chao; L.X. Zhang; E.D. Wang;

  • 作者单位

    School of Materials Science and Engineering. Harbin Institute of Technology, Weihai 264209, PR China,Room A301, School of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, PR China;

    School of Materials Science and Engineering. Harbin Institute of Technology, Weihai 264209, PR China;

    School of Materials Science and Engineering. Harbin Institute of Technology, Weihai 264209, PR China;

    School of Materials Science and Engineering. Harbin Institute of Technology, Weihai 264209, PR China,Department of Basic Sciences, Navy Aeronautical and Astronautical University, Yantai 264001, PR China;

    School of Materials Science and Engineering. Harbin Institute of Technology, Weihai 264209, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Magnesium alloy; Cold deformation; Microstructure; Twin fragmentation refinement;

    机译：镁合金冷变形;微观结构双碎片细化;

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