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<p>Cold-rolled Er modified 5083 alloy sheets were stabilized at 240–270°C, followed by an extra 10–30% cold deformation. The mass loss test results, stabilized at 260/270°C, showed the presence of relatively strong corrosion resistance, which slightly reduced after sensitization. When the stabilization time exceeded 12&#xa0;h, the precipitation rate of Mg element was lower than the solid solution rate, and the precipitation of β phase was relatively small, which maintained the corrosion resistance. After additional 10%/20%/30% cold deformation, the yield strength of the cold-rolled sheets increased while the elongation decreased, as this increases the dislocation density, elongates the grains, and generates residual stress at the same time. The results showed that the process of 260°C stabilization for 12&#xa0;h followed by 10% cold deformation could present the best comprehensive performance of 301&#xa0;MPa yield strength associated with strong corrosion resistance, with no continuous precipitation of β phase (Al<sub>3</sub>Mg<sub>2</sub>) at grain boundaries, and the microstructure mainly consisted of deformed and recovered grains.</p>

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Effect of Stabilization Treatment and Cold Deformation on Microstructure and Corrosion Resistance of Er-Modified AA5083 Aluminum Alloy

  • 期刊论文

  • 发表日期：

    2025年9月19日

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  • Wu Wei,
  • Zhengfei Guo,
  • Haoran Che,
  • Jieming Gao,
  • Shuxin Liu,
  • Hui Huang,
  • ZuoRen Nie,
  • Wei Shi

摘要

Cold-rolled Er modified 5083 alloy sheets were stabilized at 240–270°C, followed by an extra 10–30% cold deformation. The mass loss test results, stabilized at 260/270°C, showed the presence of relatively strong corrosion resistance, which slightly reduced after sensitization. When the stabilization time exceeded 12 h, the precipitation rate of Mg element was lower than the solid solution rate, and the precipitation of β phase was relatively small, which maintained the corrosion resistance. After additional 10%/20%/30% cold deformation, the yield strength of the cold-rolled sheets increased while the elongation decreased, as this increases the dislocation density, elongates the grains, and generates residual stress at the same time. The results showed that the process of 260°C stabilization for 12 h followed by 10% cold deformation could present the best comprehensive performance of 301 MPa yield strength associated with strong corrosion resistance, with no continuous precipitation of β phase (Al3Mg2) at grain boundaries, and the microstructure mainly consisted of deformed and recovered grains.