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Controlling the microstructure of magnesium alloy sheet during rolling

机译：控制轧制过程中镁合金薄板的组织

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摘要

A hot rolled magnesium alloy sheet embedded in a steel block was rolled together with 3% thickness reduction at room temperature, 373 K, and 673 K. Tensile twins were observed after the rolling, which could not be found when the magnesium alloy sheet was rolled without the steel block. The twin fraction was the highest at 373 K because of thermal expansion and activating non-basal slip systems at high temperature. Electron back-scattered diffraction analysis and finite element simulations confirmed that the steel block with higher strength played an important role in generating compressive stress along the transverse direction in the magnesium alloy sheet. The compressive stress could increase owing to suppression of thermal expansion in the magnesium alloy sheet at 373 K. The yield stress and the tensile stress became higher in the rolled specimen with the steel block at 373 K than in the specimen without it owing to grain refinement caused by tensile twins.
机译：在室温，373 K和673 K下，将嵌入钢块中的热轧镁合金薄板一起轧制，厚度降低3％。轧制后观察到拉伸孪晶，而在轧制镁合金薄板时找不到没有钢块。由于高温下的热膨胀和激活非基层滑移系统，孪生分数最高，为373K。电子背散射衍射分析和有限元模拟证实，强度较高的钢块在镁合金薄板的横向产生压缩应力方面起着重要作用。由于在373 K下抑制了镁合金薄板的热膨胀，因此压应力可能会增加。在373 K下，带有钢块的轧制试样的屈服应力和拉伸应力比未进行晶粒细化的试样更高。由拉伸双胞胎引起。

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  • 来源
    《Materials Science and Engineering》 |2014年第24期|216-221|共6页
  • 作者

    Se-Jong Kim; Chang Dong Yim; Young-Seon Lee; Jong-Hun Yoon; Jung Hwan Lee;

  • 作者单位

    Korea Institute of Material Science, 66 Sangnam-dong, Changwon-si, Cyeongnam 641-831, South Korea;

    Korea Institute of Material Science, 66 Sangnam-dong, Changwon-si, Cyeongnam 641-831, South Korea;

    Korea Institute of Material Science, 66 Sangnam-dong, Changwon-si, Cyeongnam 641-831, South Korea;

    Korea Institute of Material Science, 66 Sangnam-dong, Changwon-si, Cyeongnam 641-831, South Korea;

    Korea Institute of Material Science, 66 Sangnam-dong, Changwon-si, Cyeongnam 641-831, South Korea;

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

    Magnesium alloy; Basal texture; Twinning; Rolling; Sheet forming;

    机译：镁合金基础纹理;孪生;滚动片材成型;

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