Tribological property and subsurface damage of nanotwinned Cu/FeCoCrNi high entropy alloy nanolaminates at various scratching velocities and normal loads

The nanotwinned Cu/FeCoCrNi high entropy alloy crystalline/crystalline nanolaminates (NT Cu/HEA C/CNLs) are studied extensively due to their high strength and great plasticity, but their tribological property is still a mystery. Here, the tribological property and subsurface damage of NT Cu/HEA C/CNLs at various scratching parameters are investigated via atomic simulation. The friction coefficient, wear loss, wear rate, subsurface damage, and dislocation behavior are analyzed. A strong dependence of tribological property and subsurface damage on scratching velocity and normal load is uncovered. The results provide a prediction for wear and damage during the service of NT Cu/HEA C/CNLs, and contribute to insight into the subsurface damage mechanism. The investigation is essential to ensure the service performance and engineering application.

Automated summary

This study investigates the tribological property and subsurface damage of nanotwinned Cu/FeCoCrNi high entropy alloy crystalline/crystalline nanolaminates (NT Cu/HEA C/CNLs) through atomic simulation, revealing a strong dependence on scratching velocity and normal load.