Surface texturing has been shown to be an effective modification approach for improving\ntribological performance. This study examined the friction reduction effect generated by square\ndimples of different sizes and geometries. Dimples were fabricated on the surface of ASP2023\nsteel plates using femtosecond laser-assisted surface texturing techniques, and reciprocating sliding\nline contact tests were carried out on a Plint TE77 tribometer using a smooth 52100 bearing steel\nroller and textured ASP2023 steel plates. The tribological characterization of the friction properties\nindicated that the textured samples had significantly lowered the friction coefficient in both boundary\n(15% improvement) and mixed lubrication regimes (13% improvement). Moreover, the high data\nsampling rate results indicated that the dimples work as lubricant reservoirs in the boundary\nlubrication regime.
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