Study of the action of a femtosecond laser beam on samples of a Cu-Zn alloy

Abstract

We performed experimental researches of the action of a femtosecond laser beam on samples of a Cu-Zn alloy with 50 μm thick. We observed at the time of the laser action, the change in the maximum deflection of the cantilevered samples, which indicated their stressed-deformed state. We performed a metallographic study of the treatment zone. In the multipulse mode at an energy density below the multipulse ablation threshold on the samples surface nanostructures were formed which had ridgelike, one-dimensional lattice structure. These ridges had an average periodicity of 0.68 μm. On the surface of the brass the formation could be observed of a zinc oxide. It is highly probable that superficial zinc extraction which as the more active material is oxidized predominantly can be a result of the acceleration of the diffusion due to the frequency action and the action of the ultrafast laser pulses. Obtained results are important for problems solving of laser information technologies and are the basis for a creating of software for the aim of a controlling of lasers that provide required modes of material processing.