Nonstationary hydrodynamics in processes of laser beam-material interaction

Vladimir S. Golubev

doi:10.1117/12.337493

20 January 1999 Nonstationary hydrodynamics in processes of laser beam-material interaction

Vladimir S. Golubev

Proceedings Volume 3688, 6th International Conference on Industrial Lasers and Laser Applications '98; (1999) https://doi.org/10.1117/12.337493
Event: 6th International Conference on Industrial Lasers and Laser Applications '98, 1998, Shatura, Moscow Region, Russian Federation

Abstract

A qualitative analysis of the latest published result of investigations of deep laser beam-material penetration, with beam intensities in a range of 10⁵-10⁷ W/cm², is performed. The processes of keyhole formation and of penetration laser welding are considered. A review of some possible hydrodynamical melt surface instabilities is given. Nonlinear stage of these instabilities can be accompanied with melt droplets injection into the beam illuminated volume. A possible mechanism of periodical relaxational melt transfer in the process of keyhole formation and penetration welding is discussed. Vapor bursts generated by intensive evaporation of the melt droplets may be responsible for this mechanism.

Citation Download Citation

Vladimir S. Golubev "Nonstationary hydrodynamics in processes of laser beam-material interaction", Proc. SPIE 3688, 6th International Conference on Industrial Lasers and Laser Applications '98, (20 January 1999); https://doi.org/10.1117/12.337493

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