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<p>To investigate the effects of temperature and punch speed on the high-temperature bending behavior of rolled magnesium alloy plates, 150° bending tests were conducted under different conditions. The results indicate that at 573&#xa0;K and a punch speed of 10&#xa0;mm/min, tensile twinning in the inner region is significantly reduced, while the Schmid factor distributions of various slip systems in both the inner and outer regions become comparable, reflecting a mitigated tension—compression asymmetry. Under the condition of 523&#xa0;K and 10&#xa0;mm/min, the inner and outer regions exhibit the highest recrystallization fraction, the highest proportion of high-angle grain boundaries, and the lowest density of geometrically necessary dislocations, suggesting an optimal plastic deformation capability. In addition, static recrystallized grains retaining recrystallization characteristics are observed in the microstructure. The orientation disparity between these grains and the unrecrystallized grains exerts a pronounced influence on the overall texture: in the inner region, the large orientation difference leads to significant texture weakening (most evident at 573&#xa0;K-10&#xa0;mm/min), whereas in the outer region, the smaller orientation difference results in a relatively strong overall texture.</p>

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Effect of hot forming process parameters on the bending quality of AZ31 magnesium alloy plates

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • Rongjun Wang,
  • Pengcheng Ji,
  • Can Chen,
  • Pengchong Zhang

摘要

To investigate the effects of temperature and punch speed on the high-temperature bending behavior of rolled magnesium alloy plates, 150° bending tests were conducted under different conditions. The results indicate that at 573 K and a punch speed of 10 mm/min, tensile twinning in the inner region is significantly reduced, while the Schmid factor distributions of various slip systems in both the inner and outer regions become comparable, reflecting a mitigated tension—compression asymmetry. Under the condition of 523 K and 10 mm/min, the inner and outer regions exhibit the highest recrystallization fraction, the highest proportion of high-angle grain boundaries, and the lowest density of geometrically necessary dislocations, suggesting an optimal plastic deformation capability. In addition, static recrystallized grains retaining recrystallization characteristics are observed in the microstructure. The orientation disparity between these grains and the unrecrystallized grains exerts a pronounced influence on the overall texture: in the inner region, the large orientation difference leads to significant texture weakening (most evident at 573 K-10 mm/min), whereas in the outer region, the smaller orientation difference results in a relatively strong overall texture.