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<p>Al<sub>2</sub>CrFeNiMoSi<sub>x</sub> (x = 0, 0.25, 0.5, 0.75, 1.0) high-entropy alloy coatings were designed and fabricated on Cr12MoV by laser cladding, and the influence of Si on microstructure and wear resistance was investigated. The results show that Al<sub>2</sub>CrFeNiMoSi<sub>0</sub> coating exhibits equiaxed crystal consisted of BCC phase. However, Al<sub>2</sub>CrFeNiMoSi<sub>x</sub> (x = 0.25–1.0)&#xa0;coatings present Cr<sub>1.5</sub>Mo<sub>1.5</sub>Si besides of BCC phase, and the equiaxed crystal is significantly refined. Under the comprehensive effect of grain refinement strengthening and second-phase strengthening, the microhardness of Al<sub>2</sub>CrFeNiMoSi<sub>x</sub> coatings is improved 152 ~ 234%, and the wear volume is reduced 59.7 ~ 78.3% compared with the substrate. Among them, Al<sub>2</sub>CrFeNiMoSi<sub>0.5</sub> coating expresses the best wear performance. Al<sub>2</sub>CrFeNiMoSi<sub>0</sub> coating has fatigue wear mechanism; however, Al<sub>2</sub>CrFeNiMoSi<sub>0.5</sub> coating exhibits abrasive wear mechanism. Furthermore, the degree of oxidation wear decreases obviously with the increasing Si element.</p>

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Microstructure Characteristic and Wear Resistance of Al2CrFeNiMoSix High-Entropy Alloy Coating on Cr12MoV by Laser Cladding

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Yali Gao,
  • Shan Jiang,
  • Yu Liu,
  • Xin Li,
  • Sicheng Bai,
  • Dongdong Zhang

摘要

Al2CrFeNiMoSix (x = 0, 0.25, 0.5, 0.75, 1.0) high-entropy alloy coatings were designed and fabricated on Cr12MoV by laser cladding, and the influence of Si on microstructure and wear resistance was investigated. The results show that Al2CrFeNiMoSi0 coating exhibits equiaxed crystal consisted of BCC phase. However, Al2CrFeNiMoSix (x = 0.25–1.0) coatings present Cr1.5Mo1.5Si besides of BCC phase, and the equiaxed crystal is significantly refined. Under the comprehensive effect of grain refinement strengthening and second-phase strengthening, the microhardness of Al2CrFeNiMoSix coatings is improved 152 ~ 234%, and the wear volume is reduced 59.7 ~ 78.3% compared with the substrate. Among them, Al2CrFeNiMoSi0.5 coating expresses the best wear performance. Al2CrFeNiMoSi0 coating has fatigue wear mechanism; however, Al2CrFeNiMoSi0.5 coating exhibits abrasive wear mechanism. Furthermore, the degree of oxidation wear decreases obviously with the increasing Si element.