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<p>This study employed hot isostatic pressing (HIP) to reduce defects in cast aluminum alloys and investigated the influence of HIP holding temperature on the microstructure, mechanical properties, and corrosion resistance of the alloys. Different HIP temperatures were applied to the aluminum alloys, and the resulting changes in grain size, secondary phase distribution, and material properties were analyzed. The microstructure of the materials was observed and analyzed by <i>x</i>-ray diffraction (XRD), scanning electron microscopy (SEM), and optical microscopy (OM). Electrochemical corrosion (EC) technology was utilized to fit polarization curves and equivalent circuit models, confirming the dissolution of secondary phases and the improvement of corrosion resistance. The results indicated that HIP treatment significantly improved the microstructure of the alloys, especially at HIP temperatures of 515&#xa0;°C and 525&#xa0;°C, where grain refinement was obvious and the distribution of secondary phases became more uniform. Tensile strength and corrosion resistance were also enhanced. Additionally, this study further analyzed the evolution of grain boundary phases and their corresponding corrosion mechanisms.</p>

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Eutectic Al–Cu Evolution and Corrosion Behavior of ZL205A Aluminum Alloy via Hot Isostatic Pressing

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Peng Zhou,
  • Xinyue Wang,
  • Yike He,
  • Xiaoquan Yu,
  • Jie Li,
  • Hongyuan Shi,
  • Jiankang Huang

摘要

This study employed hot isostatic pressing (HIP) to reduce defects in cast aluminum alloys and investigated the influence of HIP holding temperature on the microstructure, mechanical properties, and corrosion resistance of the alloys. Different HIP temperatures were applied to the aluminum alloys, and the resulting changes in grain size, secondary phase distribution, and material properties were analyzed. The microstructure of the materials was observed and analyzed by x-ray diffraction (XRD), scanning electron microscopy (SEM), and optical microscopy (OM). Electrochemical corrosion (EC) technology was utilized to fit polarization curves and equivalent circuit models, confirming the dissolution of secondary phases and the improvement of corrosion resistance. The results indicated that HIP treatment significantly improved the microstructure of the alloys, especially at HIP temperatures of 515 °C and 525 °C, where grain refinement was obvious and the distribution of secondary phases became more uniform. Tensile strength and corrosion resistance were also enhanced. Additionally, this study further analyzed the evolution of grain boundary phases and their corresponding corrosion mechanisms.