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<p>In this study, the effect of solution treatment temperature on the formability of 6060 aluminum alloy sheets was investigated. The eutectic transformation temperature of the material was identified via differential scanning calorimetry analysis as 590&#xa0;°C, which defined the upper limit for the solution treatment temperature range (520–580&#xa0;°C) to prevent overburning-induced degradation. Forming limit curves under different solution treatment temperatures were predicted using the Marciniak–Kuczyński model and validated through finite element simulation and experimental verification. Finally, to elucidate the underlying mechanisms, an integrated analytical methodology was employed, incorporating scanning electron microscopy characterization, uniaxial tensile testing, and plane strain fracture toughness evaluation. The experimental results demonstrated that within the temperature range of 520–580&#xa0;°C, both strength and hardness increased with increasing solution temperature. Metallographic analysis revealed that the tensile fracture surfaces exhibited a progressive reduction in dimple density accompanied by an increase in average dimple size, suggesting reduced plasticity. The forming limit diagram analysis showed a downward shift in FLC positions with rising solution temperatures, suggesting diminished formability. Notably, theoretical predictions, numerical simulations, and experimental data showed strong agreement in the temperature-dependent trend of forming limits.</p>

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Effect of Solution Temperature on Mechanical Properties and Forming Limit of 6060 Aluminum Alloy

  • 期刊论文

  • 发表日期：

    2025年10月2日

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  • Wenzheng Dong,
  • Haiyan Li,
  • Aoyu Zhao,
  • Shuxian Zhou,
  • Qiquan Lin

摘要

In this study, the effect of solution treatment temperature on the formability of 6060 aluminum alloy sheets was investigated. The eutectic transformation temperature of the material was identified via differential scanning calorimetry analysis as 590 °C, which defined the upper limit for the solution treatment temperature range (520–580 °C) to prevent overburning-induced degradation. Forming limit curves under different solution treatment temperatures were predicted using the Marciniak–Kuczyński model and validated through finite element simulation and experimental verification. Finally, to elucidate the underlying mechanisms, an integrated analytical methodology was employed, incorporating scanning electron microscopy characterization, uniaxial tensile testing, and plane strain fracture toughness evaluation. The experimental results demonstrated that within the temperature range of 520–580 °C, both strength and hardness increased with increasing solution temperature. Metallographic analysis revealed that the tensile fracture surfaces exhibited a progressive reduction in dimple density accompanied by an increase in average dimple size, suggesting reduced plasticity. The forming limit diagram analysis showed a downward shift in FLC positions with rising solution temperatures, suggesting diminished formability. Notably, theoretical predictions, numerical simulations, and experimental data showed strong agreement in the temperature-dependent trend of forming limits.