A LITERATURE REVIEW ON GAS TUNGSTEN ARC WELDING (GTAW)
Author(s):
Jancypunitha V, Dr.B.Anandavel
Keywords:
Aspect Ratio, Non Consumable Tungsten Electrode, Optimization, Process Parameters, Shielding Gas, Tungsten Inert Gas, Weld Bead, Welding ,thorium oxide.
Abstract
Tungsten Inert Gas (TIG) welding or gas tungsten arc welding(GTAW) is an inert-gas shielded Arc welding process using non- consumable electrode .The electrodes may also contain 1 to 2%Thoria (thorium oxide) mixed along with the core tungsten or tungsten with 0.15 to 0.40%Zirconia (zirconium oxide) . It is used to weld ferrous and non-ferrous metals. This process imply several advantages like low heat effected zone, joining of unlike metals, absence of slag, high heat concentration etc compared to other welding process. The TIG welding parameters are the most important factors affecting the quality, productivity and cost of welding.TIG Welding performance is mostly evaluated based on Tensile Strength of the weld, Weld bead Geometry, Hardness, Depth of Penetration and Width–to-Depth ratio Also known as Aspect ratio. In the present study, we discuss the influence of the different welding parameters such as welding speed, power source, type of current, shielding gas flow rate, electrodes, filer wire, Electrode gap and types of shielding gases which fits best to determine arc stability, arc penetration and defect free welds. Various approaches are proposed in the literature to achieve the solution related with optimization of these parameters. This has been carried out by doing literature survey on the effective point of view which helps to compare their main features and to choose the most suitable approach for a specified application.
Article Details
Unique Paper ID: 157446

Publication Volume & Issue: Volume 9, Issue 7

Page(s): 353 - 362
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