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<p>To examine how solution aging parameters influence the microstructure and characteristics of hot-extruded 6082 aluminum alloy profiles, the study focused on hot-extruded 6082 aluminum alloy guardrails. Various solid solution aging treatments with different parameters were applied. The influence of solution aging treatment on the microstructure was examined through OM, SEM, EDS, and EBSD techniques, while a universal electronic testing machine was employed to assess how solution aging treatment affects mechanical properties. The findings indicated that with an increase in the solution temperature, the grains expanded considerably in size, while the quantity of Mg<sub>2</sub>Si second phase particles progressively diminished. This suggests that as the solution temperature increases, the solubility of the Mg<sub>2</sub>Si phase within the matrix also increases, with optimal mechanical properties of the profile noted at a solution temperature of 530&#xa0;°C. As the solution process took more time, the solubility of the Mg<sub>2</sub>Si phase in the matrix increased at first, but then decreased. The level of solution impacts the strengthening effect following aging, which causes the mechanical properties to initially rise and then fall. The optimal parameters for solid solution aging are a solid solution at 530&#xa0;°C for 50&#xa0;min, followed by aging at 120&#xa0;°C for 2&#xa0;h and then at 170&#xa0;°C for 4&#xa0;h. The process improves the mechanical properties of the sample from the initial strength of 154.7-317.6&#xa0;MPa, and the uniformity of mechanical properties between different parts is improved.</p>

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Effect of Solution Aging Parameters on Microstructure and Mechanical Properties of Hot-Extruded 6082 Aluminum Alloy Profile

  • 期刊论文

  • 发表日期：

    2025年7月9日

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  • Qiangchao Shan,
  • Linqing Yang,
  • Hongyan Wang,
  • Cheng Qian,
  • Zulai Li,
  • Han Xiao

摘要

To examine how solution aging parameters influence the microstructure and characteristics of hot-extruded 6082 aluminum alloy profiles, the study focused on hot-extruded 6082 aluminum alloy guardrails. Various solid solution aging treatments with different parameters were applied. The influence of solution aging treatment on the microstructure was examined through OM, SEM, EDS, and EBSD techniques, while a universal electronic testing machine was employed to assess how solution aging treatment affects mechanical properties. The findings indicated that with an increase in the solution temperature, the grains expanded considerably in size, while the quantity of Mg2Si second phase particles progressively diminished. This suggests that as the solution temperature increases, the solubility of the Mg2Si phase within the matrix also increases, with optimal mechanical properties of the profile noted at a solution temperature of 530 °C. As the solution process took more time, the solubility of the Mg2Si phase in the matrix increased at first, but then decreased. The level of solution impacts the strengthening effect following aging, which causes the mechanical properties to initially rise and then fall. The optimal parameters for solid solution aging are a solid solution at 530 °C for 50 min, followed by aging at 120 °C for 2 h and then at 170 °C for 4 h. The process improves the mechanical properties of the sample from the initial strength of 154.7-317.6 MPa, and the uniformity of mechanical properties between different parts is improved.