Non-monotonic wear and phase-transition-induced failure in CoCrFeNiCux high-entropy alloys

Haobing Hu

doi:10.1016/j.intermet.2026.109453

Non-monotonic wear and phase-transition-induced failure in CoCrFeNiCux high-entropy alloys

2026-07-17

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Haobing Hu

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Jingwen Gong *

史晓亮 (Xiaoliang Shi) *

DOI：10.1016/j.intermet.2026.109453

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• Non-monotonic wear behavior is observed in CoCrFeNiCux alloys with a distinct decoupling of hardness and wear resistance. • The superior hardness of low-Cu compositions originates from effective pinning by Hirth and Lomer–Cottrell locks. • Friction-induced phase transformation and amorphization at the critical Cu0.60 composition trigger structural collapse. • Failure is confirmed as non-selective collective plastic delamination rather than selective extrusion of the soft phase.

Non-monotonic wear and phase-transition-induced failure in CoCrFeNiCux high-entropy alloys

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