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Science and Technology of Welding and Joining Volume 17, 2012 - Issue 8
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Original Article

TIG and A-TIG welding experimental investigations and comparison to simulation

Part 1: Identification of Marangoni effect

A BerthierLUNAM – Institut des Matériaux Jean Rouxel (IMN), UMR Université de Nantes CNRS, 2 rue de la Houssinière, BP 32229, Nantes Cedex3 44322, France
,
P PaillardLUNAM – Institut des Matériaux Jean Rouxel (IMN), UMR Université de Nantes CNRS, 2 rue de la Houssinière, BP 32229, Nantes Cedex3 44322, FranceCorrespondence[email protected]
,
M CarinLaboratoire d’Ingénierie des MATériaux de Bretagne (LIMATB), Université de Bretagne-Sud, Centre de Recherche, Rue Saint Maudé, Lorient Cedex56321, France
,
F ValensiGREMI, Université d’Orléans/CNRS, Rue Gaston Berger, BP 4043, Bourges cedex18028, France
&
S PellerinGREMI, Université d’Orléans/CNRS, Rue Gaston Berger, BP 4043, Bourges cedex18028, France
Pages 609-615 | Received 09 Mar 2012, Accepted 30 Mar 2012, Published online: 12 Nov 2013
 
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Abstract

In the present work, the chemical mechanism was shown for tungsten inert gas (TIG) and active TIG (A-TIG) welding. The results obtained with a two-dimensional axial symmetric model developed to simulate the flow behaviour in the meting pool on a stainless steel disc (304L) melted by a stationary heat source were presented to show the influence of Marangoni convection combined with Lorentz forces. This study shows the influence of the addition of an activating flux on the geometric characteristics of the weld beads in A-TIG welding.

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