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<p>This study investigates the high-temperature performance of titanium alloys, specifically a Ti-3Al-2V near-α titanium alloy fabricated using Electron Beam Freeform Fabrication (EBF) technology. High-temperature oxidation tests were conducted at 450 and 750&#xa0;°C, and the results were compared with the room temperature microstructure and mechanical properties. The findings reveal that as the temperature increases, the surface oxidation product transitions from Ti<sub>6</sub>O to TiO<sub>2</sub>, and the internal microstructure evolves from the original structure to a basket-weave morphology. In terms of mechanical properties, the tensile strength and hardness increase with temperature, particularly the hardness, which improved from an initial value of 204.9 to 230.1 HV. However, toughness significantly decreased. The friction and wear performance showed minimal variation, although a slight decline was observed at 750&#xa0;°C. The results of this study provide a theoretical basis for the high-temperature applications of titanium alloys, particularly in aerospace and other high-temperature operational environments.</p>

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High-Temperature Oxidation Behavior of a New Type of Ti-3Al-2V Titanium Alloy at 450 and 750 °C

  • 期刊论文

  • 发表日期：

    2025年12月8日

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  • Pengfei Li,
  • Jiacheng Wu,
  • Yiming Shen,
  • Sailan Wang,
  • Jingjing Zhang,
  • Liping Liu,
  • Yuchun Peng,
  • Yongbing Chen

摘要

This study investigates the high-temperature performance of titanium alloys, specifically a Ti-3Al-2V near-α titanium alloy fabricated using Electron Beam Freeform Fabrication (EBF) technology. High-temperature oxidation tests were conducted at 450 and 750 °C, and the results were compared with the room temperature microstructure and mechanical properties. The findings reveal that as the temperature increases, the surface oxidation product transitions from Ti6O to TiO2, and the internal microstructure evolves from the original structure to a basket-weave morphology. In terms of mechanical properties, the tensile strength and hardness increase with temperature, particularly the hardness, which improved from an initial value of 204.9 to 230.1 HV. However, toughness significantly decreased. The friction and wear performance showed minimal variation, although a slight decline was observed at 750 °C. The results of this study provide a theoretical basis for the high-temperature applications of titanium alloys, particularly in aerospace and other high-temperature operational environments.