Dynamic behaviour of the weld pool in stationary GMAW

Julien Chapuis (1) , Edward Roméro (1) , Fabien Soulié (1) , Cyril Bordreuil (1) , Gilles Fras (1)

1 AS - Assemblages Soudés

Becaus hump formation limits welding productivity, better understanding of the humping phenomena during the welding process is needed to access process modifications that decrease the tendency to hump formation and then allow higher welding productivity. From a physical point of view, the mechanism identified is the Rayleigh instability initiated by a strong surface tension which induces a variation of kinetic flow. But the causes of the appearance of this instability have not yey been explained well enough.

Mots clés: GMAW; weld pool; experimental approach; dimensional analysis; wetting

Domaines: Matériaux

Julien Chapuis, Edward Roméro, Fabien Soulié, Cyril Bordreuil, Gilles Fras. Dynamic behaviour of the weld pool in stationary GMAW. 63rd Annual Assembly & International Conference of the International Institute of Welding, Jul 2010, Istanbul, Turkey. pp.39-46. ⟨hal-00807986⟩