High-efficient ablation of nickel through multiple scanning of femtosecond laser single pulse

Analysis of processing efficiency, surface, and bulk chemistry, and nanomechanical properties of the Monel® alloy 400 after ultrashort pulsed laser ablation

“…These parameters have a significant influence on the laser processing of materials. The limits chosen for the parameters were based on some existing publications i.e., for laser fluence [12], scanning velocity [8], hatching distances [22] and the number of scanning pass(es) [23].…”

“…The difference between the results of the four scanning velocities is due to the values of the laser pulse spot overlap (PO) rate and number of pulses [23]. When the scanning velocity is low, such as 100 μm s −1 , the laser pulse spot overlap rate and the number of laser pulses irradiated during a single scan are greatest.…”

“…The difference between the results of the four scanning velocities is due to the values of the laser pulse spot overlap (PO) rate, which depends on the number of pulses [23] and the equivalent ablation time [12]. The effective pulse number per focus diameter, N eff is given by N eff D f V = ´where D, f and V are focussed diameter, repetition rates and scanning velocity respectively [12].…”