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<p>Balancing strength and formability remains a key challenge for commercially pure 1060 aluminum alloy used in deep-drawing applications. In this study, cryorolling with an 80% thickness reduction was combined with subsequent annealing to regulate the microstructure, texture, and deformation behavior of 1060 aluminum alloy, with particular emphasis on deep-drawability. Cryorolling effectively suppressed dynamic recovery and promoted the accumulation of dense deformation substructures, including dislocation walls, dislocation cells, and shear bands, leading to a pronounced increase in strength but a severe loss of ductility. Subsequent annealing at 290&#xa0;°C for 50&#xa0;min enabled substantial recovery of the heavily deformed structure while retaining a refined substructure. As a result, the elongation recovered to 21.1%, while the tensile strength remained at 116.4&#xa0;MPa and the yield strength was maintained at 79.9&#xa0;MPa. EBSD and texture analyses showed that cryorolling produced strong deformation textures dominated by the γ-fiber and Brass/Copper components, whereas annealing weakened texture intensity and continuity without developing a pronounced recrystallization texture. Despite a relatively low measured r-value of 0.32, the cryogenically rolled and annealed sheet exhibited a limiting drawing ratio of approximately 2.04, higher than that of the fully annealed condition. The improved drawability is therefore more plausibly associated with improved deformation uniformity and delayed thinning/strain localization than with conventional anisotropy optimization alone. These results demonstrate that a cryorolling-annealing route can be used to achieve a favorable strength-ductility-formability balance in 1060 aluminum alloy.</p>

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Effect of cryorolling and subsequent annealing on microstructural evolution, mechanical response, and deep-drawability of 1060 aluminum alloy

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Wenbo zhang,
  • Lijuan Zhu,
  • Zhiqiang Zhang,
  • Hongjie Jia,
  • Mingwen Ren

摘要

Balancing strength and formability remains a key challenge for commercially pure 1060 aluminum alloy used in deep-drawing applications. In this study, cryorolling with an 80% thickness reduction was combined with subsequent annealing to regulate the microstructure, texture, and deformation behavior of 1060 aluminum alloy, with particular emphasis on deep-drawability. Cryorolling effectively suppressed dynamic recovery and promoted the accumulation of dense deformation substructures, including dislocation walls, dislocation cells, and shear bands, leading to a pronounced increase in strength but a severe loss of ductility. Subsequent annealing at 290 °C for 50 min enabled substantial recovery of the heavily deformed structure while retaining a refined substructure. As a result, the elongation recovered to 21.1%, while the tensile strength remained at 116.4 MPa and the yield strength was maintained at 79.9 MPa. EBSD and texture analyses showed that cryorolling produced strong deformation textures dominated by the γ-fiber and Brass/Copper components, whereas annealing weakened texture intensity and continuity without developing a pronounced recrystallization texture. Despite a relatively low measured r-value of 0.32, the cryogenically rolled and annealed sheet exhibited a limiting drawing ratio of approximately 2.04, higher than that of the fully annealed condition. The improved drawability is therefore more plausibly associated with improved deformation uniformity and delayed thinning/strain localization than with conventional anisotropy optimization alone. These results demonstrate that a cryorolling-annealing route can be used to achieve a favorable strength-ductility-formability balance in 1060 aluminum alloy.