Micromachining of Metals and Thermal Barrier Coatings using a 532 nm Nanosecond Fiber Laser

In this study, a 532 nm nanosecond pulsed Ytterbium fiber laser is used to study the physical interactions between pulsed laser beam and metal or ceramic materials. Thermal ablation model was used to determine the ablated material volume and dimensions subjected to stationary pulses and a moving laser beam. Results are compared between modelling and experimental data. Optimized machining parameters are recommended with the aim of maximum process efficiency and minimum thermal effects such as recast layer, edge protrusions and microcracks.