Laser consecutive pulse heating in relation to melting: Influence of duty cycle on melting

Laser consecutive pulse heating of steel and titanium is considered and the influence of consecutive pulse duty cycle on the melting process is examined. A model study is introduced to accommodate the phase change process while an experiment is carried out to measure the size of the melting region along the irradiated surface. The simulations are repeated for three duty cycles. It is found that the sizes of melt and mushy zones are influenced by the duty cycle; in which case, radial distribution of temperature is modified significantly for low duty cycle as compared to for high duty cycle.