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<p>In this work, the optimum hot-working conditions of powder metallurgy (PM) Al-8.3Zn-2.3Mg-2.5Cu (wt.%) alloy were obtained, and thereby the corresponding alloy sheets with high mechanical properties and low anisotropy were prepared through rolling. All rolling processes were performed at a strain rate of 1&#xa0;s<sup>−1</sup> to verify the optimal deformation parameters. At 250 and 300 °C, the dynamic recovery during deformation was hindered by coarse precipitates and <i>γ</i>-Al<sub>2</sub>O<sub>3</sub> nanoparticles inside the alloy, whereas deformation energy storage release led to abnormal grain growth during heating. At 350 and 400 °C, the recovery and recrystallization were likewise inhibited by <i>γ</i>-Al<sub>2</sub>O<sub>3</sub> nanoparticles. After T6 heat treatment, the sample rolled at 400 °C exhibited excellent mechanical properties with tensile strength of 708&#xa0;MPa, yield strength of 680&#xa0;MPa, and elongation of 11.5% at the rolling direction due to precipitation strengthening, fine grain strengthening and dislocation strengthening caused by Al<sub>2</sub>O<sub>3</sub>, and showed the in-plane anisotropy value of 0.7%. These findings provide insights into the processing of powder metallurgy aluminum alloy plates with high strength and good plasticity.</p>

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Hot Workability and Mechanical Properties of Isotropic Rolled Al-Zn-Mg-Cu Alloy Plates Based on Powder Metallurgy Billets

  • 期刊论文

  • 发表日期：

    2026年4月10日

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  • Yue Dong,
  • Yang Li,
  • Weihao Han,
  • Cunguang Chen,
  • Xiangbao Zhang,
  • Guoping Su,
  • Zhen Chen,
  • Fang Yang,
  • Xinhua Liu

摘要

In this work, the optimum hot-working conditions of powder metallurgy (PM) Al-8.3Zn-2.3Mg-2.5Cu (wt.%) alloy were obtained, and thereby the corresponding alloy sheets with high mechanical properties and low anisotropy were prepared through rolling. All rolling processes were performed at a strain rate of 1 s−1 to verify the optimal deformation parameters. At 250 and 300 °C, the dynamic recovery during deformation was hindered by coarse precipitates and γ-Al2O3 nanoparticles inside the alloy, whereas deformation energy storage release led to abnormal grain growth during heating. At 350 and 400 °C, the recovery and recrystallization were likewise inhibited by γ-Al2O3 nanoparticles. After T6 heat treatment, the sample rolled at 400 °C exhibited excellent mechanical properties with tensile strength of 708 MPa, yield strength of 680 MPa, and elongation of 11.5% at the rolling direction due to precipitation strengthening, fine grain strengthening and dislocation strengthening caused by Al2O3, and showed the in-plane anisotropy value of 0.7%. These findings provide insights into the processing of powder metallurgy aluminum alloy plates with high strength and good plasticity.