Estimation of heat flux parameters during static gas tungsten arc welding spot under argon shielding
- 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.
Autor*innen: | Sreedhar Unnikrishnakurup, Sebastien Rouquette, Fabien Soulie, Gilles Fras |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | International Journal of Thermal Sciences |
Jahr der Erstveröffentlichung: | 2017 |
Verlag: | Elsevier Masson SAS |
Jahrgang/Band: | 114 |
Erste Seite: | 205 |
Letzte Seite: | 212 |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
Freie Schlagwörter: | Gas tungsten arc welding; Heat flux estimation; Inverse heat transfer problem; Numerical simulation of welding |
DOI: | 10.1016/j.ijthermalsci.2016.12.008 |
ISSN: | ISSN 1290-0729 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 09.01.2017 |
Referierte Publikation: | Nein |