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<p>To address severe wear-induced failures in marine equipment, a marine steel substrate was coated with a eutectic high-entropy AlCoCrFeNi<sub>2.1</sub> alloy in this study via laser cladding (LC). Laser surface texturing (LST) was subsequently employed to create microtextures of different shapes (circular, square, and hexagonal) to address the inherent issue of higher friction coefficients in coatings prepared via LC. The experimental results demonstrated that all textured coatings outperformed their nontextured counterparts in terms of both wear resistance and friction reduction. Microscopic characterization through testing methods such as SEM, XPS, and EBSD revealed that the cross-sectional structure of the coating was significantly refined after laser etching, the dislocation density increased significantly, and the in situ generation of Al<sub>2</sub>O<sub>3</sub>/Cr<sub>2</sub>O<sub>3</sub> oxides led the hardness in the textured to increase by 62.4&#xa0;HV area compared with that in the unetched area. Among the geometries tested, the circular texture exhibited superior performance because of its favorable stress distribution, effective wear-debris entrapment, and minimal stress concentration, with an average friction coefficient of 0.59 and a minimal wear volume of 0.009&#xa0;mm<sup>3</sup>. This study clarifies the mechanism by which laser-generated microtextures increase coating durability through controlled wear-debris management.</p>

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Study on the Tribological Properties of Textured Coatings Prepared by the Dual-Laser Method

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Xina Wang,
  • Na Tan,
  • Changqing Ye,
  • Yang Li,
  • Shulong Ye,
  • Jingyi Tan,
  • Yongjuan Dai,
  • Yang Ding

摘要

To address severe wear-induced failures in marine equipment, a marine steel substrate was coated with a eutectic high-entropy AlCoCrFeNi2.1 alloy in this study via laser cladding (LC). Laser surface texturing (LST) was subsequently employed to create microtextures of different shapes (circular, square, and hexagonal) to address the inherent issue of higher friction coefficients in coatings prepared via LC. The experimental results demonstrated that all textured coatings outperformed their nontextured counterparts in terms of both wear resistance and friction reduction. Microscopic characterization through testing methods such as SEM, XPS, and EBSD revealed that the cross-sectional structure of the coating was significantly refined after laser etching, the dislocation density increased significantly, and the in situ generation of Al2O3/Cr2O3 oxides led the hardness in the textured to increase by 62.4 HV area compared with that in the unetched area. Among the geometries tested, the circular texture exhibited superior performance because of its favorable stress distribution, effective wear-debris entrapment, and minimal stress concentration, with an average friction coefficient of 0.59 and a minimal wear volume of 0.009 mm3. This study clarifies the mechanism by which laser-generated microtextures increase coating durability through controlled wear-debris management.