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首页> 外文期刊>Materials Science and Engineering >Activation of multiple twins by pre-tension and compression to enhance the strength of Mg-3Al-1Zn alloy plates
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Activation of multiple twins by pre-tension and compression to enhance the strength of Mg-3Al-1Zn alloy plates

机译：通过预拉伸和压缩激活多个孪晶，以增强Mg-3Al-1Zn合金板的强度

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摘要

For basal textured Mg alloy plates, {10-12} twins can be easily generated by pre-compression perpendicular to the c-axis of grains. Thus, it should be practical to strengthen Mg alloy plates by introducing twin boundaries. In this study, we show that control of the a-axis distribution is also important for enhancing the strengthening effect by pre-inducing {10-12} twins. Pre-tension along rolling direction (RD) is applied on a rolled AZ31 Mg alloy plate, and then the sample is compressed along transverse direction (TD) to generate {10-12} twins. The experimental results show that pretension causes <10-10> orientations concentrating toward RD, which promotes the activation of multiple twin variants in each grain for subsequent compression along TD. As a consequence, twin nucleation rather than twin growth is favored, and the number of twin lamellae per grain is increased, which enhances the refinement hardening effect during compression of the twinned sample along RD. The underline mechanism is analyzed, which can also provide some insights into understanding deformation mechanism of Mg alloys.
机译：对于基底织构的镁合金板，可以通过垂直于晶粒c轴的预压缩轻松生成{10-12}孪晶。因此，通过引入双边界来加强镁合金板应该是实际的。在这项研究中，我们表明，通过预诱导{10-12}双胞胎，控制a轴分布对于增强强化效果也很重要。在轧制的AZ31镁合金板上施加沿轧制方向（RD）的预张力，然后沿横向（TD）压缩样品以生成{10-12}孪晶。实验结果表明，预拉伸导致<10-10>方向朝RD方向集中，从而促进了每个晶粒中多个孪生变体的激活，以便随后沿TD压缩。结果，有利于孪晶成核而不是孪晶生长，并且每个晶粒的孪晶薄片的数量增加，这增强了孪晶样品沿RD压缩期间的细化硬化效果。对下划线机理进行了分析，也可以为理解镁合金的变形机理提供一些见识。

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  • 来源
    《Materials Science and Engineering》 |2015年第5期|100-104|共5页
  • 作者

    Bo Song; Renlong Xin; Xuan Zheng; Gang Chen; Qing Liu;

  • 作者单位

    College of Materials Science and Engineering, Chongqing University, Chongqing, China,Faculty of Materials and Energy, Southwest University, Chongqing, China;

    College of Materials Science and Engineering, Chongqing University, Chongqing, China,Sha Zheng Jie 174#, Sha Ping Ba District, Chongqing, China;

    College of Materials Science and Engineering, Chongqing University, Chongqing, China;

    College of Materials Science and Engineering, Chongqing University, Chongqing, China;

    College of Materials Science and Engineering, Chongqing University, Chongqing, China;

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

    Magnesium alloy; Twinning; Variant selection; Texture control; Strengthening;

    机译：镁合金孪生;变体选择;纹理控制;强化;

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