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Reactive laser processing generates hierarchical gradient structure for enhanced wear resistance in a TiZrNbMoTa refractory high-entropy alloy
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王
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DOI：10.1016/j.jmst.2025.12.030.png)
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Abstract
En 中文
• Reactive atmosphere laser treatment enhances wear resistance, yielding superior performance in a TiZrNbMoTa refractory high-entropy alloy. • A ∼25 μm-thick gradient structure is generated, featuring a TiN surface, stalactite-like interlayer, and cellular networks layer. • The engineered surface layer elevates nanohardness by ∼79%, from ∼5.8 GPa to ∼10.4 GPa, providing a much stronger barrier against wear. • The wear rate is reduced dramatically by over an order of magnitude, from 1.23 × 10–4 to 8.95 × 10–6 mm3/(N m), indicating exceptional wear performance. • Excellent wear resistance originates from two mechanisms: a gradient microstructure that accommodates stress and an adaptive tribolayer which dissipates stress during sliding.
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