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<p>Based on the mechanical mechanism of AZ31 magnesium alloy sheets with holes driven by differential sand dies, the effects of different driving modes on stress distribution and microstructure evolution are systematically analyzed. The mechanical models are established for two driving modes, deriving analytical expressions for the circumferential and radial stress. By loading the ratios of the circumferential stress to the radial stress in ABAQUS, simulation results of a single hole are obtained. These simulation results are validated against experimental products, confirming the accuracy of the mechanical models. Furthermore, microstructural analysis using optical microscopy and electron backscatter diffraction (EBSD) shows significant differences in microstructure between the two driving modes. In the zone with the largest deformation, the proportion of recrystallized grains for the two driving modes is 30.2% and 14.3%, respectively. These findings are consistent with the stress distribution solved by mechanical models, which further confirms their effectiveness. The integration of macroscopic mechanical mechanism with microscopic evolution provides insights for optimizing the plastic forming processes of high-performance lightweight components.</p>

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Mechanical mechanism and hole shape verification during deep-drawing process driven by differential sand dies for AZ31 magnesium alloy sheets with holes

  • 期刊论文

  • 发表日期：

    2026年3月13日

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  • Yuanyuan Li,
  • Hongyu Wang,
  • Xinyu Wang,
  • Qianyuan Guo,
  • Jie Sun,
  • Shunhu Zhang,
  • Xiangkun Ma

摘要

Based on the mechanical mechanism of AZ31 magnesium alloy sheets with holes driven by differential sand dies, the effects of different driving modes on stress distribution and microstructure evolution are systematically analyzed. The mechanical models are established for two driving modes, deriving analytical expressions for the circumferential and radial stress. By loading the ratios of the circumferential stress to the radial stress in ABAQUS, simulation results of a single hole are obtained. These simulation results are validated against experimental products, confirming the accuracy of the mechanical models. Furthermore, microstructural analysis using optical microscopy and electron backscatter diffraction (EBSD) shows significant differences in microstructure between the two driving modes. In the zone with the largest deformation, the proportion of recrystallized grains for the two driving modes is 30.2% and 14.3%, respectively. These findings are consistent with the stress distribution solved by mechanical models, which further confirms their effectiveness. The integration of macroscopic mechanical mechanism with microscopic evolution provides insights for optimizing the plastic forming processes of high-performance lightweight components.