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<p>In this study, the rolling process of Mg/Al composite with a thickness of 0.05&#xa0;mm was innovatively developed, resulting in composite foils with a final thickness of 0.05&#xa0;mm. Subsequently, the composite foils were annealed at 200, 250, 300, and 350&#xa0;°C for 10&#xa0;min, followed by the implementation of micro deep drawing (MDD) experiments. The experimental results demonstrate that the samples annealed at 300&#xa0;°C display the optimal formability. During MDD process, this significantly mitigates defects such as wrinkles, cup mouth cracks, and earing, and attains the most uniform distribution of cup mouth thickness and wall thickness. Further investigation into the height difference between the two materials at the cup mouth, caused by the differing properties of Mg and Al, show that both excessively low and high annealing temperatures could induce defects during forming, thereby exacerbating the height difference between the Mg and Al layers. An analysis was conducted on the influence of annealing treatment on the mechanical properties and microstructure of Mg/Al composite foils. The results indicate that when annealed at 300&#xa0;°C, the Mg/Al composite foils exhibit optimal ductility. The microstructure on the Mg layer is basically recrystallized. Annealing treatment can eliminate the local shear bands generated in the rolling process of the material, improve interface structure, disperse and weaken the texture, and enhance the deformation stability. In summary, annealing treatment at 300&#xa0;°C for 10&#xa0;min can effectively enhance the formability and forming quality of micro deep drawn cups.</p> Graphical abstract <p></p>

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Effects of annealing treatment on the formability of Mg/Al composite foils during micro deep drawing

  • 期刊论文

  • 发表日期：

    2026年2月27日

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  • Guang Feng,
  • Shaoyong Du,
  • Zhaopeng Li,
  • Zhongxiang Li,
  • Ning Wang

摘要

In this study, the rolling process of Mg/Al composite with a thickness of 0.05 mm was innovatively developed, resulting in composite foils with a final thickness of 0.05 mm. Subsequently, the composite foils were annealed at 200, 250, 300, and 350 °C for 10 min, followed by the implementation of micro deep drawing (MDD) experiments. The experimental results demonstrate that the samples annealed at 300 °C display the optimal formability. During MDD process, this significantly mitigates defects such as wrinkles, cup mouth cracks, and earing, and attains the most uniform distribution of cup mouth thickness and wall thickness. Further investigation into the height difference between the two materials at the cup mouth, caused by the differing properties of Mg and Al, show that both excessively low and high annealing temperatures could induce defects during forming, thereby exacerbating the height difference between the Mg and Al layers. An analysis was conducted on the influence of annealing treatment on the mechanical properties and microstructure of Mg/Al composite foils. The results indicate that when annealed at 300 °C, the Mg/Al composite foils exhibit optimal ductility. The microstructure on the Mg layer is basically recrystallized. Annealing treatment can eliminate the local shear bands generated in the rolling process of the material, improve interface structure, disperse and weaken the texture, and enhance the deformation stability. In summary, annealing treatment at 300 °C for 10 min can effectively enhance the formability and forming quality of micro deep drawn cups.

Graphical abstract