Seam Formation in Laser Beam Micro-Welding with Spatial Power Modulation

Abstract When laser sources of high brilliance are used for the micro-welding metals, small seam dimensions generated. If spatial power is modulated by a superposition linear feed rate and circular-oscillatory movement frequency, width controlled amplitude circular movement. In this study, irradiation pattern was calculated reveals that some spots area not irradiated, while other have been irradiated several times. The shapes were visualized with micro cross-sections different powers, rates oscillatory amplitudes. Thermal simulations made to discuss shapes. A consequence appearance solidification fronts, which visible in cross-sections.