Femtosecond Laser-Induced Evolution of Surface Micro-Structure in Depth Direction of Nickel-Based Alloy

The surface coating properties of turbine blades are highly dependent on the material’s roughness, and femtosecond laser-induced micro-structure can provide a wide range roughness with periodicity. However, precise control is difficult. In this paper, we extend application two-temperature model combine it experiments to accurately reveal evolution law depth at different single pulse energies, as well influence two processing parameters micro-structure, namely, defocusing amount scanning speed. findings study reliable theoretical guidance for fast accurate material open new possibilities properties.