A review of Pulse current gas tungsten arc welding for different alloys

Pulse current gas tungsten arc welding is an important joining technique for different metals like Aluminium, Magnesium, Steel, Titanium and their alloys. With increasing application of these metals and alloys in aerospace, aircraft, automotive, electronics and other industries PTIGW is the best technique evolved so far. In this document an attempt has been made to critically review this welding technique from different perspective for different metals and alloys. Some important PTIGW processing parameters and their effect on weld quality are discussed. The microstructure and metallurgical defects encountered during welding process such as porosity, cracking, oxide inclusions and loss of alloying elements are described. Mechanical properties of welds such as hardness, tensile and fatigue strength, and other important structural properties are discussed. The aim of the report is to review the recent progress in PTIGW of different metals and alloys and to provide the basis for follow-on research.