Conduction Heating of Solid Surfaces

Abstract

Laser conduction heating involves with a solid phase heating for a stationary or moving sources. In order to accommodate the absorption of irradiated laser energy, a volumetric source consideration should be incorporated. Since the analytical solution for such heating situation is possible, a closed form solution for the temperature field is provided firstly. In order to assess the influence of duty cycle on the temperature field, a numerical model is introduced. To study the thermal effects, two-dimensional axisymmetric solid is considered for a stationary source and three-dimensional heating situation is incorporated for a moving source in the model studies. The laser heating is involved with the assisting gas processing; therefore, the convection effect of the assisting gas is incorporated in the analysis. Since the heating duration is longer than the thermalization time of the substrate material for most of the surface treatment processes, the Fourier heating law is incorporated in the analysis. In this chapter, Laser conduction heating of solid surfaces is introduced and analytical approaches for temperature field in the irradiated region is presented for the appropriate boundary and heating conditions.