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<p>Titanium alloys, particularly Ti-6Al-4&#xa0;V, are widely used in aerospace and biomedical fields due to their high strength-to-weight ratio and corrosion resistance. However, their high coefficient of friction (CoF) and wear susceptibility limit performance. This study introduces a novel approach combining laser texturing with chemical modification to enhance the tribological and hydrophobic properties of Ti-6Al-4&#xa0;V. Laser parameters, optimized via nanoindentation hardness measurements, were used to create parallel groove and crosshatched groove textures, which were then treated with 1H,1H,2H,2H-perfluorooctanetrichlorosilane (FOTS) to reduce surface energy and improve wettability. The laser textured surfaces exhibited a CoF reduction of 26% under dry friction, 28% under starved-water, and 47% under starved-oil lubrication conditions. After FOTS modification, the surfaces became superhydrophobic, with water contact angles up to 157.1 ± 0.9°. Under starved-water conditions, the CoF was reduced by up to 71% compared to the polished substrate. These results highlight the potential of combining laser texturing and chemical modification to significantly improve the tribological properties and durability of titanium alloys for aerospace, biomedical, and industrial applications.</p>

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Tribological Properties of Superhydrophobic Ti-6Al-4V Alloy with Laser Texturing and Chemical Modification under Dry and Starved Lubrication Conditions

  • 期刊论文

  • 发表日期：

    2025年9月5日

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  • Jialiang Guo,
  • Chengdi Li,
  • Quanbin Du,
  • Yuhuai Liu

摘要

Titanium alloys, particularly Ti-6Al-4 V, are widely used in aerospace and biomedical fields due to their high strength-to-weight ratio and corrosion resistance. However, their high coefficient of friction (CoF) and wear susceptibility limit performance. This study introduces a novel approach combining laser texturing with chemical modification to enhance the tribological and hydrophobic properties of Ti-6Al-4 V. Laser parameters, optimized via nanoindentation hardness measurements, were used to create parallel groove and crosshatched groove textures, which were then treated with 1H,1H,2H,2H-perfluorooctanetrichlorosilane (FOTS) to reduce surface energy and improve wettability. The laser textured surfaces exhibited a CoF reduction of 26% under dry friction, 28% under starved-water, and 47% under starved-oil lubrication conditions. After FOTS modification, the surfaces became superhydrophobic, with water contact angles up to 157.1 ± 0.9°. Under starved-water conditions, the CoF was reduced by up to 71% compared to the polished substrate. These results highlight the potential of combining laser texturing and chemical modification to significantly improve the tribological properties and durability of titanium alloys for aerospace, biomedical, and industrial applications.