Vapour flow modelling in deep penetration laser welding

Author

Amara, E.H. ; Fabbro, R. ; Bendib, A.

Author_Institution

Centre de Developpement des Technol. Avancees, Algiers, Algeria

fYear

2003

fDate

22-27 June 2003

Firstpage

564

Abstract

In most of welding processes the energy deposited at surface of the work-piece and transported inside by heat conduction. By laser beams it is deposited deeply inside a narrow cavity or a keyhole developed by the multiple reflections phenomenon. It is surrounded by the melted metal and maintained open by continuous vaporization of the material . The induced vapour pressure acts with the ablation pressure against the pressures due to the melt, avoiding the collapsing and the obstruction of the keyhole . hi our contribution , the thermodynamic parameters (ρ,p,T,v) distribution is obtained by solving a hydrodynamic system describing the behaviour of the vapour flow.

Keywords

finite volume methods; heat conduction; hydrodynamics; laser beam welding; laser beams; optical materials; ray tracing; vaporisation; vapour pressure; ablation pressure; compressible vapour flow; deep penetration; finite volume method; heat conduction; hydrodynamic system; keyhole obstruction; laser beams; laser welding process; multiple reflection phenomenon; narrow cavity; ray-tracing; thermodynamic parameters; vaporization; vapour flow modelling; vapour pressure; Conducting materials; Hydrodynamics; Inorganic materials; Laser ablation; Laser beams; Laser modes; Optical materials; Optical reflection; Thermodynamics; Welding;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Europe, 2003. CLEO/Europe. 2003 Conference on

Print_ISBN

0-7803-7734-6

Type

conf

DOI

10.1109/CLEOE.2003.1313626

Filename

1313626