Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
STUDY OF ABLATION ON SURFACES OF ZIRCALOY Z-4 IRRADIATED WITH FEMTOSECOND LASER
Submission Author:
Paulo Guanabara Jr , SP
Co-Authors:
Paulo Guanabara Jr, Ricardo Samad, Wagner de Rossi
Presenter: Paulo Guanabara Jr
doi://10.26678/ABCM.COBEM2019.COB2019-1208
Abstract
Abstract. The use of ultrashort pulses laser of femtoseconds is an alternative for micro-machining on metal surfaces,with several applications in various industrial areas, such as aeronautics, aerospace, naval, nuclear, among others,where there is a growing concern with reliability in service. Thus, markings for traceability purposes must ensure theintegrity of the metal as well as provide the reading of the marked characters, whether automated or not. In thiswork, micro-machining of zircaloy Z-4 surfaces using femtosecond laser was performed aiming at the knowledge of the ablation threshold and Scanning Electron Microscopy (SEM) analysis in different images obtained from micro-machined traces with different parameters of energy fluence and laser pulse overlap. The amount of material ablated in femtosecond laser micro-machining is negligible, which contributes to ensuring that there is no microstructural damage. Such a process resulted in different images, which characterize that there are different optical properties because of the changes of the aforementioned parameters.
Keywords
ultrashort, femtosecond, Micro-machining, Zircaloy Z-4, ablation.
