On arc efficiency in gas tungsten arc welding
Open Access
- 1 December 2013
- journal article
- Published by FapUNIFESP (SciELO) in Soldagem & Inspeção
- Vol. 18 (4) , 380-390
Abstract
The aim of this study was to review the literature on published arc efficiency values for GTAW and, if possible, propose a narrower band. Articles between the years 1955 - 2011 have been found. Published arc efficiency values for GTAW DCEN show to lie on a wide range, between 0.36 to 0.90. Only a few studies covered DCEP - direct current electrode positive and AC current. Specific information about the reproducibility in calorimetric studies as well as in modeling and simulation studies (considering that both random and systematic errors are small) was scarce. An estimate of the average arc efficiency value for GTAW DCEN indicates that it should be about 0.77. It indicates anyway that the GTAW process with DCEN is an efficient welding method. The arc efficiency is reduced when the arc length is increased. On the other hand, there are conflicting results in the literature as to the influence of arc current and travel speed.Keywords
This publication has 12 references indexed in Scilit:
- Measuring the process efficiency of controlled gas metal arc welding processesScience and Technology of Welding and Joining, 2011
- Experimental quantification in thermal plasma medium of the heat flux transferred to an anode materialJournal of Physics D: Applied Physics, 2007
- Estimation of heat source and thermal efficiency in GTAW process by using inverse techniquesJournal of Materials Processing Technology, 2006
- A heat-transfer and fluid-flow-based model to obtain a specific weld geometry using various combinations of welding variablesJournal of Applied Physics, 2005
- Arc power and efficiency in gas tungsten arc welding of aluminiumScience and Technology of Welding and Joining, 2005
- Measurement and calculation of arc power and heat transfer efficiency in pulsed gas metal arc weldingScience and Technology of Welding and Joining, 2003
- Susceptibility of iron castings to heat absorption from an electric arc and to hardened-layer shapingMetallurgical and Materials Transactions A, 2003
- Energy balance in argon-helium mixed gas tungsten (TIG) arcs. Study of characteristics of gas tungsten arc shielded by mixed gases (3rd Report)Welding International, 1998
- Determination of gas tungsten arc welding efficienciesExperimental Thermal and Fluid Science, 1994
- Distribution of the heat and current fluxes in gas tungsten arcsMetallurgical Transactions B, 1985