Laser heating of semi-infinite solid with consecutive pulses: Influence of materaial properties on temperature field

The heating of solid surfaces using consecutive laser pulses is studied and the temperature field inside slabs with different thermal properties is predicted. A Gaussian beam intensity distribution is assumed at the irradiated surface and axisymmetric heating situation is accommodated in the numerical simulations. The materials selected include titanium, stainless steel, tantalum, nickel, and aluminum. A control volume approach is introduced to discretize the governing equation of heat transfer. It is found that temperature rise in the early heating period is higher than that in the later heating period. The temperature difference between two consecutive pulses is higher in the heating cycle than that corresponding to the cooling cycle of the consecutive pulses.