The Paton Welding Journal, 2008, №07

2008 №07 (01)

2008 №07 (03)

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The Paton Welding Journal, 2008, #7, 11-15 pages

Theoretical investigation of dynamic behavior of molten pool in laser and hybrid welding with deep penetration

G. Turichin¹, E. Valdaitseva¹, E. Pozdeeva¹, U. Dilthey², A. Gumeniuk²

¹St.-Petersburg State Polytechnic University, St.-Petersburg, Russia
²ISF – Welding and Joining Institute, Aachen University, Aachen, Germany.

Abstract
The article devoted to the simulation of dynamic phenomena of the laser welding process with deep penetration. The presented model is a future development of steady-state model of laser welding. It based on the approach of Lagrange mechanics and takes into account melt flow, wave motion on the cavity surface, melting viscosity, bubble pressure, recoil pressure and radiation parameters. The results of calculations describe self-oscillation nature of the cavity shape during welding. With the base of presented model a simulation of keyhole collapse, leading to defect formation, and a description of acoustic emission spectra from the cavity has been developed.
Keywords: laser welding, self-oscillation process, defects, mathematical model, monitoring

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Suggested Citation

G.A. Turichin, E.A. Valdajtseva, E. Pozdeeva, U. Dilthey, A.V. Gumenyuk (2008) Theoretical investigation of dynamic behavior of molten pool in laser and hybrid welding with deep penetration. The Paton Welding J., 07, 11-15.

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