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<p>High-entropy alloy coatings (HEACs) of Al<sub>x</sub>Cr<sub>20</sub>Nb<sub>30</sub>Ti<sub>35</sub>V<sub>10</sub>Si<sub>8</sub> (<i>x</i> = 30, 40, and 50, molar ratio) were fabricated on the Ti6Al4V by laser cladding. Calculations of relevant parameters and phase diagram were completed. Microstructure of the coatings was characterized. The friction and wear tests were performed. The results show that these coatings have high hardness, high wear resistance, and low density. Metallurgical bonds between the substrates and coatings were formed. The HEACs are mainly composed of BCC phase, Laves phase, spherical Al<sub>3</sub>Ti phase, and particle Al<sub>3</sub>Ti phase. Wear resistance of the coatings decreases with the increase of Al content. The wear resistance of Al30 coating is 41,099, which is 2.84 times that of the substrate. Variation of the coefficients of friction was analyzed based on the evolution of oxide morphology in the wear tracks. Al30 and Al40 coatings formed a stable oxide layer during friction, providing protection and reducing the friction coefficients.</p> Graphical abstract <p></p>

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The influence of aluminum content on the microstructure and friction-wear properties of the AlxCr20Nb30Ti35V10Si8 high-entropy alloy coating

  • 期刊论文

  • 发表日期：

    2026年3月26日

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  • Zhaoyang Peng,
  • Hongxi Liu,
  • Wenqi Cao,
  • Yueyi Wang,
  • Chen Yang,
  • Yaxia Liu,
  • Xiaowei Zhang,
  • Xubiao Liu

摘要

High-entropy alloy coatings (HEACs) of AlxCr20Nb30Ti35V10Si8 (x = 30, 40, and 50, molar ratio) were fabricated on the Ti6Al4V by laser cladding. Calculations of relevant parameters and phase diagram were completed. Microstructure of the coatings was characterized. The friction and wear tests were performed. The results show that these coatings have high hardness, high wear resistance, and low density. Metallurgical bonds between the substrates and coatings were formed. The HEACs are mainly composed of BCC phase, Laves phase, spherical Al3Ti phase, and particle Al3Ti phase. Wear resistance of the coatings decreases with the increase of Al content. The wear resistance of Al30 coating is 41,099, which is 2.84 times that of the substrate. Variation of the coefficients of friction was analyzed based on the evolution of oxide morphology in the wear tracks. Al30 and Al40 coatings formed a stable oxide layer during friction, providing protection and reducing the friction coefficients.

Graphical abstract