abstract
- © 2022 The Authors. Published by Elsevier B.V.Medical devices require features at the micro-scale which represent a challenge for the manufacturing process. Fiber laser cutting is capable to generate micro geometries with high accuracy and low surface roughness. Nitinol is a self-expanding material with the unique capacity of self-deployment and performance in the medical industry. In this work, we presented the influence of laser cutting parameters (i.e., feed rate, laser pulse frequency, pulse width and laser power) on surface roughness of Nitinol manufactured by fiber laser cutting. Our results indicate that the association of laser parameters in spot overlapping, and pulse energy contributes to reduce variables and to analyze the surface topography making laser power and feed rate of great significance in the manufacturing process of nitinol. Additionally, a combination of a laser pulse frequency of 600 Hz and a feed rate of 500 mm/min (Of = 78.3%) resulted with the lowest values of surface roughness (~0.96 µm), while increasing the feed rate to 750 mm/min (Of = 67.4%) resulted with the highest values of surface roughness (~2.1 µm).