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Influence of aluminum content on the texture and sheet formability of AM series magnesium alloys

机译：铝含量对AM系列镁合金织构和板材成形性的影响

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摘要

The fabrication of magnesium (Mg) alloy sheets with both high mechanical strength and superior cold formability was sought by optimizing the aluminum (Al) content of the alloy sheets. We investigated the influence of varying Al content from 3 wt% to 8 wt% on the texture, mechanical properties, and stretch formability of AM series Mg alloys, processed by high-temperature rolling. The ultimate tensile strength improved steadily from 247 MPa to 303 MPa with an increase in Al, due to solid solution strengthening. The basal texture intensity decreased with increasing Al content, reached a minimum value at 6 wt% Al, and then increased as more Al was added. The weakest basal texture led to the smallest Lankford value and the largest strain hardening exponent in the AM60 (6wt% Al) alloy. The alloys with lower Al contents of 3-5 wt% exhibited a high fracture elongation of 27%, which continuously decreased to 23% as the Al content increased to 8 wt%. The AM50 alloy exhibited excellent stretch formability with the largest Erichsen value of 9.1, while the AM30 and AM80 alloys showed much smaller Erichsen values of 5.6 and 6.0, respectively. This can be attributed to a good balance among the decreased r-value, increased n-value, and enhanced tensile ductility in the AM50 alloy, despite its basal texture being slightly stronger than that of the AM60 alloy.
机译：通过优化合金板中铝（Al）的含量，寻求制造具有高机械强度和优异的冷成形性的镁（Mg）合金板。我们研究了Al含量从3 wt％到8 wt％变化对通过高温轧制加工的AM系列Mg合金的织构，力学性能和拉伸成形性的影响。由于固溶强化，随着Al的增加，极限抗拉强度从247MPa稳定地提高到303MPa。基础织构强度随Al含量的增加而降低，在Al含量为6 wt％时达到最小值，然后随着更多Al的添加而增加。最弱的基础织构导致AM60（6wt％Al）合金的最小Lankford值和最大的应变硬化指数。 Al含量为3-5wt％的较低合金显示出27％的高断裂伸长率，当Al含量增加至8wt％时，该断裂伸长率连续降低至23％。 AM50合金具有出色的拉伸成形性，最大Erichsen值为9.1，而AM30和AM80合金的Erichsen值分别小得多，分别为5.6和6.0。这可以归因于AM50合金的r值减小，n值增加和拉伸延展性增强之间的良好平衡，尽管其基础纹理比AM60合金略强。

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  • 来源
    《Materials Science and Engineering》 |2015年第1期|144-153|共10页
  • 作者

    Xinsheng Huang; Kazutaka Suzuki; Yasumasa Chino; Mamoru Mabuchi;

  • 作者单位

    Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), Nagoya, Aichi 463-8560, Japan;

    Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), Nagoya, Aichi 463-8560, Japan;

    Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), Nagoya, Aichi 463-8560, Japan;

    Graduate School of Energy Science, Kyoto University, Kyoto 606-8501, Japan;

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

    Magnesium alloy; Aluminum content; Texture; Mechanical property; Formability;

    机译：镁合金铝含量;质地;机械性能可成型性;

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