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Structural and crystallographic study on 3004 aluminum alloy ingot by horizontal direct chill casting under combined electromagnetic fields

机译：复合电磁场水平直接冷铸3004铝合金锭的组织和晶体学研究

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摘要

Effect of combined electromagnetic fields (EMFs) on the structures of a 3004 aluminum alloy ingot produced by horizontal direct chill casting was crystallographically investigated. The results showed that the structure was transformed from a mixture of equiaxed and fine columnar grains to coarse columnar grains with switching off the EMFs. With the EMFs the grain size is small and shows a uniform distribution, whereas without the EMFs it is increased and reveals inhomoge-neous distribution on the cross section. Besides, a transition region composed of fine equiaxed grains appeared at the moment the EMFs were switched off (between the mixture and coarse columnar grains). Furthermore, the microstructure transformation is accompanied by a crystallographic orientation change from a preferred <100> orientation to a random orientation, and then to an intense <100> fiber texture. The structural and crystallographic transformations are mainly related to the forced convection in the melt due to the induced Lorentz force by the EMFs.
机译：晶体学研究了组合电磁场（EMF）对水平直接冷铸生产的3004铝合金铸锭结构的影响。结果表明，在关闭电动势的情况下，该结构从等轴细圆柱状晶粒的混合物转变为粗圆柱状晶粒。使用EMF时，晶粒尺寸较小且显示出均匀的分布，而如果使用EMF，则晶粒尺寸会增大并显示出横截面上的不均匀分布。此外，在关闭电动势时（在混合物和粗圆柱状晶粒之间）出现了由细等轴晶粒组成的过渡区域。此外，微结构转变伴随着晶体学取向从优选的<100>取向变为无规取向，然后变为强烈的<100>纤维织构。结构和晶体学的转变主要与由于电动势引起的洛伦兹力引起的熔体中的强制对流有关。

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  • 来源
    《Journal of Materials Research》 |2015年第5期|745-752|共8页
  • 作者

    Lei Li; Qingfeng Zhu; Zhihao Zhao; Haitao Zhang; Yubo Zuo; Jianzhong Cui;

  • 作者单位

    Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, People's Republic of China;

    Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, People's Republic of China;

    Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, People's Republic of China;

    Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, People's Republic of China;

    Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, People's Republic of China;

    Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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