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Annealing treatment improved wear resistance and corrosion properties in high-entropy alloy, indicating enhanced performance for biomedical applications.
As-cast TiZrMoSn0.8Hf0.2 high-entropy alloy (HEA) was prepared by vacuum non-consumable arc melting furnace, followed by annealing treatment at 600-900℃. The effect of annealing treatment on the phase composition, microstructure, hardness, friction and wear properties, and corrosion resistance have been investigated. The results showed that the as-cast alloy was composed of BCC-β+HCP-α solid solution phases and Hf5Sn3. After annealing treatment, the microstructure of the samples were refined, and the Mo3Sn phase formed at 600°C, but it was unstable and decomposed above 700°C. The hardness and wear resistance of the alloy are improved after annealing. The highest hardness, lowest friction coefficient, and the smallest wear scar width and depth were obtained after annealing at 600°C due to its fine microstructure and the formation of Mo3Sn phase. The wear mechanism of this alloy is mainly adhesive wear and abrasive wear. Compared with the as-cast alloy, the annealed samples possessed more positive corrosion potential, lower corrosion current density, and better corrosion resistance in Ringer’s corrosion solution.
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Xu et al. (2025) studied this question.
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