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<p>The effects of intermediate annealing and cross-rolling on the microstructure and formability of Al-Mg-Si alloy sheets were systematically investigated in this study. The addition of an intermediate annealing process effectively eliminated the Goss texture in T4P sheets after solution treatment and pre-aging, while simultaneously enhancing the uniformity of Cube texture distribution on the sheet surface compared to unidirectional rolling. Consequently, the anisotropy of the alloy was reduced, and the Roping performance was improved. Cross-rolling caused the overall texture to rotate and gather toward the B/P{011}&lt;1-11&gt; texture, and an atypical {013}&lt;7-31&gt; texture was observed in T4P sheets after solution treatment and pre-aging with finer and more uniform grains. The orientation relationship between the {013}&lt;7-31&gt; and B/P{011}&lt;1-11&gt; textures was approximately 40°&lt;111&gt;, which is the preferred grain growth orientation relationship. This atypical {013}&lt;7-31&gt; texture significantly reduced the anisotropy of the alloy, as its <i>r</i>-value remained uniform in all directions with a fluctuation range of only 0.09-0.53. Furthermore, the atypical {013}&lt;7-31&gt; texture was beneficial for improving the Roping performance. The optimal microstructure and texture distribution identified can provide theoretical guidance for the industrial manufacturing of Al-Mg-Si automotive sheets.</p>

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Effect of Processing Path on Microstructure and Uniform Deformation of Al-Mg-Si Alloy Sheet

  • 期刊论文

  • 发表日期：

    2025年10月6日

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  • Jilong Ran,
  • Jingwei Zhao,
  • Zhenshan Liu,
  • Pizhi Zhao,
  • Xiaocheng Shi,
  • Xueguang Dong,
  • Kangcai Yu,
  • Kaixin Chen,
  • Meng Liu,
  • Rui Wang,
  • Qingfeng Zhu,
  • Qichi Le

摘要

The effects of intermediate annealing and cross-rolling on the microstructure and formability of Al-Mg-Si alloy sheets were systematically investigated in this study. The addition of an intermediate annealing process effectively eliminated the Goss texture in T4P sheets after solution treatment and pre-aging, while simultaneously enhancing the uniformity of Cube texture distribution on the sheet surface compared to unidirectional rolling. Consequently, the anisotropy of the alloy was reduced, and the Roping performance was improved. Cross-rolling caused the overall texture to rotate and gather toward the B/P{011}<1-11> texture, and an atypical {013}<7-31> texture was observed in T4P sheets after solution treatment and pre-aging with finer and more uniform grains. The orientation relationship between the {013}<7-31> and B/P{011}<1-11> textures was approximately 40°<111>, which is the preferred grain growth orientation relationship. This atypical {013}<7-31> texture significantly reduced the anisotropy of the alloy, as its r-value remained uniform in all directions with a fluctuation range of only 0.09-0.53. Furthermore, the atypical {013}<7-31> texture was beneficial for improving the Roping performance. The optimal microstructure and texture distribution identified can provide theoretical guidance for the industrial manufacturing of Al-Mg-Si automotive sheets.