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<p>In this paper, the effects of different annealing processes on the microstructure and properties of 2024 aluminum alloy were systematically studied by means of metallographic microscope (OM), scanning electron microscope (SEM), electron backscatter diffraction (EBSD), mechanical tensile and corrosion resistance tests. The results show that after 80% large deformation cold rolling, the samples annealed at 220℃/120&#xa0;min + 320℃/10&#xa0;min and 280℃/120&#xa0;min have high strength and hardness, low plasticity and poor corrosion resistance due to the characteristics of deformed grains. However, the annealed samples at 380℃/120&#xa0;min have a high degree of recrystallization, equiaxed grains and a high proportion of special grain boundaries, so the comprehensive properties of the alloy are better. The texture types of the 220℃/120&#xa0;min + 320℃/10&#xa0;min annealed state are mainly Brass-<i>R</i>, <i>P</i><sub><i>45°</i></sub> and <i>F</i> textures. The 280℃/120&#xa0;min annealed state is Cube texture, while the 380℃/120&#xa0;min annealed state forms weak <i>R</i>-Cube and <i>E</i>, <i>E</i><sub><i>T1</i></sub> and <i>F</i> on the <i>γ</i> orientation line.</p>

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Effect of Annealing Process on Microstructure, Texture and Properties of 2024 Aluminum Alloy with Large Deformation

  • 期刊论文

  • 发表日期：

    2025年4月3日

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  • Jian Haigen,
  • Yang Man,
  • Chen Miao,
  • Pai Junjun,
  • Fang Wu,
  • Xiao Kemou

摘要

In this paper, the effects of different annealing processes on the microstructure and properties of 2024 aluminum alloy were systematically studied by means of metallographic microscope (OM), scanning electron microscope (SEM), electron backscatter diffraction (EBSD), mechanical tensile and corrosion resistance tests. The results show that after 80% large deformation cold rolling, the samples annealed at 220℃/120 min + 320℃/10 min and 280℃/120 min have high strength and hardness, low plasticity and poor corrosion resistance due to the characteristics of deformed grains. However, the annealed samples at 380℃/120 min have a high degree of recrystallization, equiaxed grains and a high proportion of special grain boundaries, so the comprehensive properties of the alloy are better. The texture types of the 220℃/120 min + 320℃/10 min annealed state are mainly Brass-R, P45° and F textures. The 280℃/120 min annealed state is Cube texture, while the 380℃/120 min annealed state forms weak R-Cube and E, ET1 and F on the γ orientation line.