Study on Discharge Behavior of Hollow Tungsten Arc Coaxially Assisted by Fiber Laser Welding

In this study, a processing platform based on hollow tungsten arc coaxially assisted by fiber laser (HTAAL) was developed. The HTAAL discharge process was analyzed through physical experiments and numerical simulations. The coupling effect between the laser and the hollow tungsten arc (HTA) was examined, the factors influencing HTAAL discharge stability were identified, and the coupling mechanism was explained separately. The findings showed that laser power had a significant impact on HTAAL discharge behavior. As laser power increased, the arc discharge exhibited different types. The variations in discharge were attributed to differences in several aspects, including discharge mode, current density distribution, high-temperature zone shape, arc conductivity, and the effect of laser plasma under different laser power conditions.