Friction control by multi-shape textured surface under pin-on-disc test

Most of laser surface texturing (LST) research has been conducted on the use of single-shape dimpled effect on the tribological properties. Though under multi-shape LST, the dimpled surface may have a different effect on the tribological properties due to the combined dimples. This paper discussed the effect of multi-shape LST on tribological properties under different conditions. The multi-shape textured surface was fabricated by the laser ablation process by combining different geometric patterns. The tribological tests were conducted by a flat-on-flat tribometer. It was found that the multi-shape LST significantly reduces friction under dry and lubrication conditions, when compared with untextured surfaces. The beneficial effect of textured surface is more pronounced at higher sliding speeds. •The effect of LST on tribological properties was studied using pin-on-disc test.•A new multi-shape LST was made by Nd:YAG laser ablation by combining different geometrical shaps.•The textured surfaces improved the tribological properties than the untextured surfaces under dry and lubricated conditions.•The beneficial effect of multi-shape LST is more pronounced at higher sliding speeds.