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<p>In this study, the effects of different levels of pre-deformation and cyclic straining amplitudes on the mechanical performance and microstructural characteristics of the 2024 aluminum alloy were explored. 2024 aluminum alloy samples were first solution-treated at 495&#xa0;°C for 1&#xa0;h and then subjected to pre-deformation in the range from 1 to 7% at room temperature, followed by cyclic straining. Combined mechanical deformation processes, i.e., pre-deformation and cyclic straining, enabled the control over cluster precipitation, dislocation configurations, and the spatial distribution of strain, enhancing both the strength and ductility of the aluminum alloy. This approach offers novel insight into the design of aluminum alloys with desired strength and ductility. The changes in dislocation configurations, microstructure, and the spatial distribution of strain under different pre-deformation levels and cyclic strain amplitudes were meticulously studied. The results indicate that subjecting the alloy to pre-deformation before cyclic straining improves the alloy’s strength and ductility. The strength enhancement is attributed to the synergistic effects of dislocation strengthening and cluster strengthening, while the improved ductility is attributed to dislocation loops and evenly distributed strain.</p>

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Synergistic Effects of Pre-deformation and Cyclic Straining on the Microstructure and Mechanical Properties of 2024 Aluminum Alloys

  • 期刊论文

  • 发表日期：

    2025年12月3日

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  • Ye Wang,
  • Hai Li,
  • Yunjvan Shangguan,
  • Chao Huang,
  • Xingwang Du,
  • Zhixiu Wang

摘要

In this study, the effects of different levels of pre-deformation and cyclic straining amplitudes on the mechanical performance and microstructural characteristics of the 2024 aluminum alloy were explored. 2024 aluminum alloy samples were first solution-treated at 495 °C for 1 h and then subjected to pre-deformation in the range from 1 to 7% at room temperature, followed by cyclic straining. Combined mechanical deformation processes, i.e., pre-deformation and cyclic straining, enabled the control over cluster precipitation, dislocation configurations, and the spatial distribution of strain, enhancing both the strength and ductility of the aluminum alloy. This approach offers novel insight into the design of aluminum alloys with desired strength and ductility. The changes in dislocation configurations, microstructure, and the spatial distribution of strain under different pre-deformation levels and cyclic strain amplitudes were meticulously studied. The results indicate that subjecting the alloy to pre-deformation before cyclic straining improves the alloy’s strength and ductility. The strength enhancement is attributed to the synergistic effects of dislocation strengthening and cluster strengthening, while the improved ductility is attributed to dislocation loops and evenly distributed strain.