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<p>The effect of hot-rough rolling deformation on the microstructure, texture, formability, and roping of the Al–Mg–Si alloy sheet was systematically investigated using optical microscopy, scanning electron microscopy with electron backscatter diffraction, tensile tests, and a 3D topographic map. The results indicate that after different hot-rough rolling processes, sheet A with a smaller pass reduction exhibited a predominant recrystallized Cube{001} &lt; 100 &gt; texture and larger grain sizes. In contrast, the sheet B with a larger pass reduction had a much finer grain size and a lower fraction of Cube orientation. Following subsequent processing, final sheet A developed a stronger Cube texture, with Cube grains tending to align along the rolling direction. In contrast, the final sheet B exhibited finer grain sizes, a weaker Cube texture, and a more random grain orientation distribution. This led to a higher average plastic strain ratio <i>r</i> value, improved formability, and significantly reduced roping. Further experimental analysis revealed that sheets with a small pass reduction generated more coarse fibrous grains during hot-rough rolling deformation, which were further elongated in subsequent processing. During the solution treatment, Cube grains nucleated and grew at grain boundaries and cubic bands, forming continuous Cube orientation band-like arrangements that worsened the roping behavior. Therefore, increasing the pass reduction rate promotes more recrystallization, reduces coarse Cube grains in hot-rough-rolled sheets, and thereby improves the formability and roping behavior of the final sheet.</p>

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Synergistic improvement of microstructure, texture, roping, and formability of Al–Mg–Si sheets via hot-rough rolling deformation

  • 期刊论文

  • 发表日期：

    2026年7月2日

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  • Jingwei Zhao,
  • Xiulei Li,
  • Kaixin Chen,
  • Binghui Luo,
  • Zhenshan Liu,
  • Xiaocheng Shi,
  • Qinghua Zhou,
  • Zhongguo Sun,
  • Liqun Ding,
  • Pizhi Zhao

摘要

The effect of hot-rough rolling deformation on the microstructure, texture, formability, and roping of the Al–Mg–Si alloy sheet was systematically investigated using optical microscopy, scanning electron microscopy with electron backscatter diffraction, tensile tests, and a 3D topographic map. The results indicate that after different hot-rough rolling processes, sheet A with a smaller pass reduction exhibited a predominant recrystallized Cube{001} < 100 > texture and larger grain sizes. In contrast, the sheet B with a larger pass reduction had a much finer grain size and a lower fraction of Cube orientation. Following subsequent processing, final sheet A developed a stronger Cube texture, with Cube grains tending to align along the rolling direction. In contrast, the final sheet B exhibited finer grain sizes, a weaker Cube texture, and a more random grain orientation distribution. This led to a higher average plastic strain ratio r value, improved formability, and significantly reduced roping. Further experimental analysis revealed that sheets with a small pass reduction generated more coarse fibrous grains during hot-rough rolling deformation, which were further elongated in subsequent processing. During the solution treatment, Cube grains nucleated and grew at grain boundaries and cubic bands, forming continuous Cube orientation band-like arrangements that worsened the roping behavior. Therefore, increasing the pass reduction rate promotes more recrystallization, reduces coarse Cube grains in hot-rough-rolled sheets, and thereby improves the formability and roping behavior of the final sheet.