An analysis of the laser-plasma interaction in laser keyhole welding
- 14 June 1989
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 22 (6) , 741-749
- https://doi.org/10.1088/0022-3727/22/6/004
Abstract
In penetration welding with a laser, a plasma is formed in the keyhole. In the energy exchange process it is to be expected that a substantial part of the power is absorbed directly at the walls of the keyhole, but another exchange mechanism is the interaction of the laser beam with the plasma. A simple model of this part of the process is described and its properties are investigated. It is found to be consistent, and estimates are obtained for the parameters. The existence of a linking intensity is deduced. This relates the power absorbed by the workpiece per unit thickness of the workpiece to the laser power available at each cross section of the keyhole.Keywords
This publication has 9 references indexed in Scilit:
- A method for calculating the fused zone profile of laser keyhole weldsJournal of Physics D: Applied Physics, 1989
- A point and line source model of laser keyhole weldingJournal of Physics D: Applied Physics, 1988
- On laser fusion cutting of metalsJournal of Physics D: Applied Physics, 1987
- Upwelling in the liquid region surrounding the keyhole in penetration welding with a laserJournal of Physics D: Applied Physics, 1987
- A keyhole model in penetration welding with a laserJournal of Physics D: Applied Physics, 1987
- Some aspects of the fluid dynamics of laser weldingJournal of Fluid Mechanics, 1983
- Hydrodynamic limit to penetration of a material by a high-power beamJournal of Physics D: Applied Physics, 1976
- Transport Phenomena in a Completely Ionized GasPhysical Review B, 1953
- The Electrical Conductivity of an Ionized GasPhysical Review B, 1950