The following theoretical and experimental work presents a study on the influence of texture parameters on the tribological performance of dimpled steel surfaces. Different texture parameters were selected through hydrodynamic lubrication modeling based on the two-dimensional Reynolds equation and literature search. For the experimental work, microscopic spherical cavities (i.e., dimples) were created by laser on 25 mm steel discs. The textured specimens were tested in a unidirectional sliding line-contact block-on-ring set-up at different rotational speeds. The experiments showed that the area-density-ratio, dimple-depth, and dimple-diameter can significantly affect the tribological performance of steel surfaces. Specimens containing dimples with lower depth, lower area-density-ratio, and smaller diameters, exhibited significant improvements over a smooth steel surface. The most remarkable achievement was a 28.6% friction reduction at 20 RPM and an overall improvement of 13% considering all speeds.

中文翻译：

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激光纹理钢表面在单向滑动线接触（块对环）中的摩擦学性能

以下理论和实验工作介绍了纹理参数对凹坑钢表面摩擦学性能影响的研究。基于二维雷诺方程和文献检索，通过流体动力润滑建模选择不同的织构参数。在实验工作中，通过激光在 25 毫米钢盘上创建了微小的球形空腔（即凹坑）。在不同转速下在单向滑动线接触块环设置中测试了纹理试样。实验表明，面积密度比、凹坑深度和凹坑直径对钢表面的摩擦学性能有显着影响。包含具有较低深度、较低面积密度比和较小直径的凹坑的样本，在光滑的钢表面上表现出显着的改进。最显着的成就是在 20 RPM 时摩擦减少了 28.6%，考虑到所有速度，整体改进了 13%。