ON THE MODELING OF PLASMA DYNAMICS IN THE KEYHOLE DURING LASER WELDING OF METAL WITH DEEP PENETRATION
The material was received by the Editorial Board: 07.04.2009
The physical processes occurring in a keyhole during deep penetration laser welding of aluminium are theoretically investigated. Evaporation, ionization and formation of low-temperature surface plasma on metal vapor can be observed. Equations of radiation flow dynamics are solved in the conjugated statement in assumption of equilibrium plasma. Numerical simulations of plasma propagation are conducted in one-dimensional approximation. Minimal value of laser power necessary for maintenance of the plasma is received. The affect of blocking of plasma self-radiation as a result of increasing its optical thickness is obtained. Results of the modeling are of interest for qualitative understanding of processes occurring in plasma, which may arise in a keyhole. Keywords:
gas dynamics, surface plasma, laser welding, numerical simulation.
УДК 533.6.01; 533.9.02
ON THE MODELING OF PLASMA DYNAMICS IN THE KEYHOLE DURING LASER WELDING OF METAL WITH DEEP PENETRATION References: Bedenko D. V., Kovalev O. B. ON THE MODELING OF PLASMA DYNAMICS IN THE KEYHOLE DURING LASER WELDING OF METAL WITH DEEP PENETRATION. Vestnik NSU. Series: Physics. 2009, vol. 4, no. 4. P. 5–14 (in Russ.). DOI: 10.54362/1818-7919-2009-4-4-5-14