Ablation effects of femtosecond laser functionalization on steel surfaces

摘要: Abstract In this work, the topographical and chemical effects of femtosecond laser irradiation on industrial 100Cr6 steel surfaces are analyzed. The irradiated areas present cavities with conical spikes at their center an outer ring zone periodical structures called sub-wavelength ripples. number pulses drastically influences morphology both zones. Abbott–Firestone curves show that 1 μm depth have best load capacity might increase lubrication efficiency due to homogeneous topographic profile. elemental profile obtained by X-ray photoelectron spectroscopy reveals produces a carbide shift increases iron oxide layer thickness factor 1.7 compared native layer. Raman analysis presence metallic carbon bands. distribution amorphous crystalline depends intensity. leads amorphization zones, according melt-quenching phenomena. These novel results permit better understanding ablation phenomena in steels.