Predicting arc pressure in GTAW for a variety of process parameters using a coupled sheath and LTE arc model

To date, several numerical models predicting the properties of TIG-arcs are available. Recently, effort has been put into testing the reliability of these models for varying process parameters by means of comparing plasma temperatures and arc voltages against measured data. However, from an engineer...

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Bibliographic Details
Published in:Welding in the world 2018-05, Vol.62 (3), p.629-635
Main Authors: Lohse, M., Trautmann, M., Siewert, E., Hertel, M., Füssel, U.
Format: Article
Language:English
Subjects:
Beads
Chemistry and Materials Science
Gas tungsten arc welding
Materials Science
Mathematical models
Metallic Materials
Numerical prediction
Process parameters
Research Paper
Solid Mechanics
Theoretical and Applied Mechanics
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Summary:To date, several numerical models predicting the properties of TIG-arcs are available. Recently, effort has been put into testing the reliability of these models for varying process parameters by means of comparing plasma temperatures and arc voltages against measured data. However, from an engineering point of view, the goal of these models is to predict the properties of weld beads. Therefore, the heat input into and the pressure applied onto the workpiece have to be predicted. This paper deals with the comparison of measured arc pressure data and the results of an approach which couples a simplified cathode sheath model with an LTE arc model.
ISSN:0043-2288
1878-6669
DOI:10.1007/s40194-018-0559-9