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<p>To reveal the influence of TiB<sub>2</sub> particles on the thermal deformation behavior of Al-Cu-Mg alloys, thermal compression experiments were conducted in the temperature range of 340 to 500 °C, the strain rate range of 0.01 to 10 s<sup>−1</sup>. Arrhenius-type constitutive equations were formulated to characterize the flow behavior of the alloys, and the microstructures of the deformed alloys were analyzed. The results indicate that TiB<sub>2</sub> particles markedly refine the grains of Al-Cu-Mg alloys from 117 to 35 µm (0.1 wt% TiB<sub>2</sub>) and 29 µm (1 wt% TiB<sub>2</sub>). Both the reduction of grain size and the presence of TiB<sub>2</sub> particles contribute to an increased flow stress during thermal deformation. And the grain refinement induced by the addition of TiB<sub>2</sub> particles enhances dynamic recrystallization processes. The excess TiB<sub>2</sub> particles (1 wt% TiB<sub>2</sub>) further stimulate dynamic recrystallization via the particle-stimulated nucleation mechanism. Moreover, the addition of TiB<sub>2</sub> particles effectively suppresses the coarsening of recrystallized grains in Al-Cu-Mg alloys following thermal deformation.</p>

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Effect of TiB2 particles on the thermal deformation and recrystallization behaviour of Al-Cu-Mg alloys

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • Qifei Mao,
  • Min Hu,
  • Jiahao Wang,
  • Chong Li,
  • Jinfeng Nie,
  • Zongning Chen,
  • Yongchang Liu

摘要

To reveal the influence of TiB2 particles on the thermal deformation behavior of Al-Cu-Mg alloys, thermal compression experiments were conducted in the temperature range of 340 to 500 °C, the strain rate range of 0.01 to 10 s−1. Arrhenius-type constitutive equations were formulated to characterize the flow behavior of the alloys, and the microstructures of the deformed alloys were analyzed. The results indicate that TiB2 particles markedly refine the grains of Al-Cu-Mg alloys from 117 to 35 µm (0.1 wt% TiB2) and 29 µm (1 wt% TiB2). Both the reduction of grain size and the presence of TiB2 particles contribute to an increased flow stress during thermal deformation. And the grain refinement induced by the addition of TiB2 particles enhances dynamic recrystallization processes. The excess TiB2 particles (1 wt% TiB2) further stimulate dynamic recrystallization via the particle-stimulated nucleation mechanism. Moreover, the addition of TiB2 particles effectively suppresses the coarsening of recrystallized grains in Al-Cu-Mg alloys following thermal deformation.