1 February 2001 Self-defocusing of a laser beam in the process of deep-penetration welding
Author Affiliations +
Proceedings Volume 4348, Fourth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering; (2001) https://doi.org/10.1117/12.417621
Event: Fourth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, 2000, St. Petersburg, Russian Federation
Abstract
In this contribution, we report on the results of analytical approaches and computer simulations of laser beam self- defocusing in laser induced plasma and gas oncoming flow above a cavity in deep penetration welding at atmospheric conditions. Nonlinear lens-like processes in oncoming jet flow ensure the feedback loop between the evaporation, penetration and laser beam intensity distribution in a workpiece. The processes are self-consistent with the conditions of the stable cavity existence. It is shown that the oncoming hot air jet flow above the plume brings the main contribution in the steady state and instability of the nonlinear beam broadening, which may reach 300%.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nikolay E. Galich, Valery A. Petrushchenkov, "Self-defocusing of a laser beam in the process of deep-penetration welding", Proc. SPIE 4348, Fourth International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, (1 February 2001); doi: 10.1117/12.417621; https://doi.org/10.1117/12.417621
PROCEEDINGS
10 PAGES


SHARE
RELATED CONTENT

Picosecond laser welding of optical to metal components
Proceedings of SPIE (March 04 2016)
Beam Absorption Mechanism In Laser Welding
Proceedings of SPIE (November 12 1986)
Develoment of 2D simulation model for laser welding
Proceedings of SPIE (February 07 2000)
Laser keyhole welding on aluminum alloys
Proceedings of SPIE (February 07 2000)

Back to Top