CO2 laser–plume interaction in materials processing

摘要: In laser materials processing, localized evaporation caused by focused radiation forms a plume of mixed vapor and ambient gas above the material surface. The beam is refracted absorbed as it traverses plume, thus modifying its power density on this work, plume–beam interaction studied using an axisymmetric, high-temperature gas-dynamic model formed from iron propagation in calculated paraxial wave equation including absorption refraction. simulation results quantify effects plasma properties radius variations at It shown that refraction have significant impacts laser–material interaction. Absorption has much less direct effect surface than does. However, essential for formation without which t...