Study of Cu-Zn Alloy Objects Vibration Characteristics During Laser-induced Nanopores Formation

The study of the vibration characteristics of Cu-Zn alloy objects has been performed during laser-induced nanopores formation. It was determined that in the near-surface layer the pulse-periodic laser action forms a nanoporous structure ∼100 nm wide. Pulse-periodic laser action was used to determine the samples' responses to external vibroexcitation and their wave forms were registered. As the analysis' result of the samples' responses to this external vibroexcitation, it was found that the vibration rate increases in the case of frequencies that are divisible by the frequency of initial oscillation, during the amplitude decrease and the frequency increase. It was concluded that a very important condition for the development of generic thermodynamic moving force which could intensify the formation of nanoporous structure in a metallic material, is the non-permanent elastic deformation, which was caused by high-powered external action.