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<p>With the continuous increase in performance requirements for biomedical equipment, traditional 6061 aluminum alloy has gradually exhibited limitations in terms of friction, wear resistance and biocompatibility, which restrict its widespread clinical application. In response to this challenge, femtosecond laser processing was utilized to generate annular micro-textures with controlled area densities on the surface of 6061 aluminum alloy. The role of synergistic effect in multi-functional performance regulation is systematically studied. The research results show that the reasonably designed annular concave pit microstructure significantly reduces the friction coefficient and wear amount. Compared with the smooth surface, they are reduced by 51.07% and 29.53%, respectively, demonstrating excellent anti-friction and anti-wear performance. The biocompatibility of the NK-92 immune cell line was evaluated by the CCK-8 method. The results revealed that femtosecond laser surface modification markedly improved cytocompatibility, with the 48&#xa0;h cell proliferation rate increasing by 60.2%, from 0.384 in the untreated group to 0.615. This research successfully achieved the synergistic optimization of the tribological properties and biocompatibility of 6061 aluminum alloy, expanded its application potential in the field of biomedical devices and provided new ideas for the design of multi-functional materials based on surface microstructure regulation.</p>

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Femtosecond laser-induced annular micro-textures on 6061 aluminum alloy: a synergistic strategy to improve tribological behavior and biocompatibility

  • 期刊论文

  • 发表日期：

    2025年8月31日

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  • Yan Xiaoni,
  • Geng Nan,
  • Liu Yicong,
  • Cao Shengwei,
  • Guo Junde,
  • Yang Wei

摘要

With the continuous increase in performance requirements for biomedical equipment, traditional 6061 aluminum alloy has gradually exhibited limitations in terms of friction, wear resistance and biocompatibility, which restrict its widespread clinical application. In response to this challenge, femtosecond laser processing was utilized to generate annular micro-textures with controlled area densities on the surface of 6061 aluminum alloy. The role of synergistic effect in multi-functional performance regulation is systematically studied. The research results show that the reasonably designed annular concave pit microstructure significantly reduces the friction coefficient and wear amount. Compared with the smooth surface, they are reduced by 51.07% and 29.53%, respectively, demonstrating excellent anti-friction and anti-wear performance. The biocompatibility of the NK-92 immune cell line was evaluated by the CCK-8 method. The results revealed that femtosecond laser surface modification markedly improved cytocompatibility, with the 48 h cell proliferation rate increasing by 60.2%, from 0.384 in the untreated group to 0.615. This research successfully achieved the synergistic optimization of the tribological properties and biocompatibility of 6061 aluminum alloy, expanded its application potential in the field of biomedical devices and provided new ideas for the design of multi-functional materials based on surface microstructure regulation.