LASER SURFACE TEXTURING PARAMETERS AND THEIR EFFECTS ON THE SURFACE PROPERTIES OF TI-6AL-7NB BIOMEDICAL ALLOY

Owing to the advantages of using nanosecond laser pulses to create a specific surface texture on biomedical alloys, laser texturing is considered to be a viable processing approach. In this study, roughness and wettability of surfaces were used to determine how different factors, including frequency (F), scan direction (SD), fill spacing (FS), and scan speed (SS), affect the surface texture of the Ti–6Al–7Nb alloy. It was revealed that the FS significantly [Formula: see text] influenced the surface roughness parameter (Sa) and contact angle (CA); an increase in the FS value resulted in smoother surfaces exhibiting higher mean CA. The SS significantly [Formula: see text] affected the mean Sa; the SS of 800[Formula: see text]mm/s showed the lowest mean Sa. Lower mean Sa values and higher mean CAs were obtained as FS, SS, and F were increased. The texture of surface topography is highly affected by both pulse-to-pulse and hatch overlap ratios. The parameter with the slightest effect on CA and Sa, according to process optimizations, was found to be F. The surfaces exhibited superhydrophilic and hydrophilic properties. The textured surface with the highest CA of [Formula: see text] exhibited a Sa of 1.58 [Formula: see text]m. The surface with the highest Sa value of 10.25[Formula: see text] [Formula: see text]m exhibited superhydrophilic properties. The surface textured with the process parameters of 0 ∘ /45 ∘ SD, 800[Formula: see text]mm/s SS, 100[Formula: see text]kHz F, and 0.01[Formula: see text]mm FS exhibited the smoothest surface with a Sa value of 1.21 [Formula: see text]m.