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Article Dans Une Revue International Journal of Thermal Sciences Année : 2017

Estimation of heat flux parameters during static gas tungsten arc welding spot under argon shielding

Sébastien Rouquette
Fabien Soulié
Gilles Fras
  • Fonction : Auteur

Résumé

A multi-physics modelling of a static Gas Tungsten Arc Welding (GTAW) operation has been established in order to estimate the heat flux exchanged between the arc plasma and the work-piece. The heat flux was described with a Gaussian function where two parameters required to be estimated: process efficiency and radial distribution. An inverse heat transfer problem (ihtp) has been developed in the aim to estimate these parameters from experimental data. Levenberg-Marquardt algorithm was used as the regularization method in addition to an iterative process. The experiment consisted in a static spot weld with GTAW process. The weld spot was on for 5 s under Argon shielding gas, 2.4 mm pure tungsten electrode on a SS304L disc. Temperatures were measured with thermocouples and weld pool growth monitored with a high speed camera. The experimental data were used to solve the ihtp what led to values such as 0.7 for process efficiency and average radial distribution of 1.8 mm.
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Dates et versions

hal-01576966 , version 1 (24-08-2017)

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Sreedhar Unnikrishnakurup, Sébastien Rouquette, Fabien Soulié, Gilles Fras. Estimation of heat flux parameters during static gas tungsten arc welding spot under argon shielding. International Journal of Thermal Sciences, 2017, 114, pp.205-212. ⟨10.1016/j.ijthermalsci.2016.12.008⟩. ⟨hal-01576966⟩
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