@article{LIANG2024, 
author = {Fei LIANG and Yixing SUN and Hongyuan WAN and Yong LI and Wenhao LU and Ao MENG and Lei GU and Zhaoping LUO and Yan LIN and Yaping ZHANG and Xiang CHEN},
title = {Unlocking wear resistance in an ultrastrong dual-phase high-entropy alloy by interface-constrained deformation of brittle Laves phases},
year = {2024},
journal = {Friction},
volume = {12},
number = {10},
pages = {2389-2398},
keywords = {wear resistance, high-entropy alloy, Laves phase, heterogeneous structure},
url = {https://www.sciopen.com/article/10.1007/s40544-024-0884-5},
doi = {10.1007/s40544-024-0884-5},
abstract = {The pronounced brittleness of hard Laves phase intermetallics is detrimental to their tribological properties at room temperature. In this study, we utilized a heterogeneous structure to engineer an ultrastrong dual-phase (Laves + B2) AlCoFeNiNb high-entropy alloy that exhibits a low wear rate (3.82×10-6 mm3/(N·m)) at room temperature. This wear resistance in the ball-on-disc sliding friction test with the counterpart of Al2O3 balls stems from the activated deformation ability in the ultrafine Laves lamellae under heterogeneous interface constraints. Furthermore, as tribological stress intensifies, the surface deformation mechanism transitions from dislocation slip on the basal and pyramidal planes to a unique combination of local shear and grain rotation within the Laves phase. Our study illuminates fresh perspectives for mitigating the embrittling effect of Laves phase intermetallics under tribological loading and for the development of wear-resistant materials.}
}