High Frequency Gas Tungsten Arc Welding Process for Dressing of Weldment

Abstract

The present investigation aims to apply High frequency GTAW variants to apply for the purpose of dressing of weldments. Numerous studies has reviled that the different dressing techniques has improved the life for weldments by modifying the weld bead geometry. It is found that the cracks occur at the weld joints where the stress concentration of the weld geometries is very high. GTAW Dressing reduce the severity of the stress concentration at the weld, remove imperfections, and/or introduce local compressive stresses at the weld can be used for improvement of the fatigue life. This paper compares the variants of GTAW process used for Dressing process in a mild steel fillet welded plate and evaluates the weld bead geometry, microstructure and its surface hardness.