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<p>The effects of multistage rolling–aging treatment on the mechanical properties, electrical conductivity, and microstructure of Al-Cu-Sn alloy were investigated, and the underlying mechanisms were explained. The results show that the Al-1.5Cu-0.25Sn (3#) and Al-2.0Cu-0.25Sn (4#) alloys undergo this treatment and exhibit excellent comprehensive properties, with hardness values of 78 and 94&#xa0;HV, electrical conductivity values of 62.0%IACS and 60.1%IACS, ultimate tensile strength values of 236 and 285&#xa0;MPa, and elongation values of 13.5 and 10.5%. After multistage rolling–aging treatment, the precipitates of the alloy gradually change from plate-shaped to spherical-shaped. Additionally, the average size of the precipitates gradually decreases. The multistage thermomechanical treatment process maintains a high density of dislocations while forming numerous fine, dispersed, and uniformly distributed spherical precipitates, thereby enhancing the mechanical and electrical properties of the conductive aluminum alloy.</p>

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Improving the strength and electrical conductivity of Al-Cu-Sn alloy by multistage rolling–aging treatment

  • 期刊论文

  • 发表日期：

    2025年12月26日

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  • Shucun Huo,
  • Shengping Wen,
  • Xingkai Hou,
  • Shangshang Liang,
  • Wu Wei,
  • Xiaolan Wu,
  • Hui Huang,
  • Kunyuan Gao,
  • Xiangyuan Xiong,
  • Zuoren Nie

摘要

The effects of multistage rolling–aging treatment on the mechanical properties, electrical conductivity, and microstructure of Al-Cu-Sn alloy were investigated, and the underlying mechanisms were explained. The results show that the Al-1.5Cu-0.25Sn (3#) and Al-2.0Cu-0.25Sn (4#) alloys undergo this treatment and exhibit excellent comprehensive properties, with hardness values of 78 and 94 HV, electrical conductivity values of 62.0%IACS and 60.1%IACS, ultimate tensile strength values of 236 and 285 MPa, and elongation values of 13.5 and 10.5%. After multistage rolling–aging treatment, the precipitates of the alloy gradually change from plate-shaped to spherical-shaped. Additionally, the average size of the precipitates gradually decreases. The multistage thermomechanical treatment process maintains a high density of dislocations while forming numerous fine, dispersed, and uniformly distributed spherical precipitates, thereby enhancing the mechanical and electrical properties of the conductive aluminum alloy.