Impact of evolving surface nanoscale topologies in femtosecond laser structuring of Ni-based superalloy CMSX-4

Abstract : We investigate the role of surface nanoscale topographies in the inhomogeneous coupling of laser radiation to Ni-based superalloy CMSX-4 surfaces and in the formation of laser-induced periodic surface structures. The initial surface arbitrary roughness is already able, upon laser exposure, to induce low-spatial-frequency and high-spatial-frequency structures, actively determining an interference of incoming and scattered fields resulting in spatial energy modulation. A topology variation with the incoming dose via the number of pulses determines a correlated evolution in the regular ripple arrangements. The scattering pattern is severely influenced by the scattering source geometries. Therefore, we equally study experimentally the role of one-dimensional nanoscale grooves in determining polarization-dependent structuring patterns at increasing irradiation dose. Finally, the role of surface nanostructures in generating the surface modulation of deposited energy is analyzed by finite-difference-time-domain simulation. Ripple formation in multi-pulses is a result of the feedback process between light and nanostructures.
Type de document :
Article dans une revue
Journal of Optics, Institute of Physics (IOP), 2016, 18, pp.015402. 〈IOP〉. 〈10.1088/2040-8978/18/1/015402〉
Liste complète des métadonnées

https://hal-ujm.archives-ouvertes.fr/ujm-01260714
Contributeur : Razvan Stoian <>
Soumis le : vendredi 22 janvier 2016 - 15:02:12
Dernière modification le : jeudi 26 juillet 2018 - 01:10:43

Identifiants

Citation

Li Chen, Guanghua Cheng, Jean-Philippe Colombier, Nicolas Faure, Stephanie Reynaud, et al.. Impact of evolving surface nanoscale topologies in femtosecond laser structuring of Ni-based superalloy CMSX-4. Journal of Optics, Institute of Physics (IOP), 2016, 18, pp.015402. 〈IOP〉. 〈10.1088/2040-8978/18/1/015402〉. 〈ujm-01260714〉

Partager

Métriques

Consultations de la notice

54