Comparison of perforation effect between long pulse and continuous laser irradiation on aluminum alloy plates

Abstract

In order to explore the impact of different laser systems on the perforation capacity of aluminum alloy plates, a combination of numerical simulation and experimental methods is used under the same average power condition. The distributions of temperature field and molten pool of aluminum alloy plates irradiated by long pulse and continuous laser are obtained. The results show that under the irradiation of continuous laser, a stable temperature field will be formed on the surface of the target, and the perforation time will be longer; Under the irradiation of pulse laser, the surface temperature of the target rapidly increases, resulting in a shorter perforation time. Further analysis shows that under the action of continuous laser, the surface heat of targets has sufficient time to diffuse to the surrounding areas through thermal conduction and convective heat transfer, reducing the energy utilization.