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<p>Inspired by the hierarchical porous architecture of lotus root nodes, this study pioneers a biomimetic surface texture engineered for TC4 titanium alloy as a foundational investigation on flat coupons. Utilizing laser ablation technology, the optimized bionic pattern was fabricated on TC4 surfaces to enhance tribological performance. Through modeling and experimental validation, this study quantitatively analyzed stress distribution, friction coefficient evolution, thermal behavior, and microstructural transformations pre- and post-optimization. Results demonstrated that the TC4 surface with the bionic lotus root-like texture embedded with SnAgCu solid lubricant exhibited significantly enhanced tribological characteristics under both dry friction conditions and oil-lubricated conditions, compared to the untextured surface. Mechanistically, the texture enables in situ debris entrapment (suppressing three-body abrasion), acts as a lubricant reservoir (sustaining boundary lubrication), and promotes stress dispersion (delaying crack initiation), synergistically improving friction and wear performance. Furthermore, its heat dissipation performance also showed improvement under oil lubrication.</p>

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Optimization of Tribological Performance of TC4 through Bionic Lotus Root Cross Section Prepared by Laser Ablation

  • 期刊论文

  • 发表日期：

    2025年11月28日

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  • Haowen Qin,
  • Yuxuan Chen,
  • Haohui Li,
  • Xiaoliang Shi,
  • Haobing Hu,
  • Chaohua Wu,
  • Weijie Zheng,
  • Yongxiang Jiang,
  • Xuan Chen

摘要

Inspired by the hierarchical porous architecture of lotus root nodes, this study pioneers a biomimetic surface texture engineered for TC4 titanium alloy as a foundational investigation on flat coupons. Utilizing laser ablation technology, the optimized bionic pattern was fabricated on TC4 surfaces to enhance tribological performance. Through modeling and experimental validation, this study quantitatively analyzed stress distribution, friction coefficient evolution, thermal behavior, and microstructural transformations pre- and post-optimization. Results demonstrated that the TC4 surface with the bionic lotus root-like texture embedded with SnAgCu solid lubricant exhibited significantly enhanced tribological characteristics under both dry friction conditions and oil-lubricated conditions, compared to the untextured surface. Mechanistically, the texture enables in situ debris entrapment (suppressing three-body abrasion), acts as a lubricant reservoir (sustaining boundary lubrication), and promotes stress dispersion (delaying crack initiation), synergistically improving friction and wear performance. Furthermore, its heat dissipation performance also showed improvement under oil lubrication.