Laser repetitive pulse heating influence of pulse duty on temperature rise

Abstract

Laser repetitive pulse heating of the solid surface is considered and influence of duty cycle in the repetitive pulses on the temperature rise and temperature difference at the surface is examined. Laser power distribution with Gaussian profile is assumed and 3D heating model is accommodated in the heating analysis. A numerical method is employed to solve governing equations of heat transfer. It is found that the rate of surface temperature rise is high and temperature difference is large for high duty cycle during the consecutive pulse irradiation. This in turn enhances the thermal cyclic loading of the heated surface.