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<p>In this report, it is surprising that the microstructure at the surface was relatively coarser than the inner region of accumulative roll-bonding (ARB)-processed aluminium, which was contradictory to the widely published findings. Crystal plasticity finite element method (CPFEM) was adopted to study the behaviours of texture evolution. The experimental characterization and CPFEM predictions showed that the texture almost reached saturation after 1-ARB, and relatively large and small crystallographic rotation angles were found at the centre and surface, respectively. The constantly same strain was imposed at the surface, and the crystallographic texture rotated towards the same orientation and thus resulted in coarse microstructure. In contrast, the strain altered from shear deformation to compression at the centre, which led to relatively large crystallographic rotation angles and thus finer grains. This coarse microstructure resulting from converging texture has been observed in other severe plastic deformation methods, but the first time in ARB.</p>

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Converging Texture Slows Microstructure Refinement in Accumulative Roll-Bonding Deformed Commercial Purity Aluminium

  • 期刊论文

  • 发表日期：

    2025年7月30日

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  • Xi Huang,
  • Letian Cao,
  • Shuqi Liu,
  • Junyao Dong,
  • Hui Wang

摘要

In this report, it is surprising that the microstructure at the surface was relatively coarser than the inner region of accumulative roll-bonding (ARB)-processed aluminium, which was contradictory to the widely published findings. Crystal plasticity finite element method (CPFEM) was adopted to study the behaviours of texture evolution. The experimental characterization and CPFEM predictions showed that the texture almost reached saturation after 1-ARB, and relatively large and small crystallographic rotation angles were found at the centre and surface, respectively. The constantly same strain was imposed at the surface, and the crystallographic texture rotated towards the same orientation and thus resulted in coarse microstructure. In contrast, the strain altered from shear deformation to compression at the centre, which led to relatively large crystallographic rotation angles and thus finer grains. This coarse microstructure resulting from converging texture has been observed in other severe plastic deformation methods, but the first time in ARB.