Simulation of laser plasma induced processes in the surface layersof multicomponent amorphous-nanocrystalline alloy
By computer simulation, peculiarities of the heating and cooling of the thin film specimens irradiated with a series of laser pulses have been studied. The thickness of the surface layer strengthened due to realization of the processes of mechanical stresses relaxation, recrystallization, and plastic deformation of material is determined. Selective impact of laser plasma on the material areas with defects acting as stress concentrators has been demonstrated. It is shown that the depth of the treated surface layer can run up to 20-25% of the total thickness of the thin specimen. Comparison of the simulation results with experimental data on the effect of pulsed laser irradiation on the properties of thin ribbon specimens from amorphous-nanocrystalline Co71,66B4,73Fe3,38Cr3,14Si17,09 alloy was carried out.