Effect of Shielding Gas on Titanium CP (Gr-2) by Using Gas Tungsten Arc Welding

This work presents a comparison between different techniques of shielding gas supply for commercially pure titanium grade-2 (as per the AWS D10.6M) by using Gas Tungsten Arc Welding (GTAW) with respect to mechanical properties of weld metal and cost of welding processes. In this work, four type of shielding gases are used, that is pure argon, pure helium, premixed gases of (Ar+He) 75:25% respectively and alternative gas supply of Argon and Helium. This technology of alternate supply of shielding gas improves every aspect of quality of arc welding. The dynamic motion (stir motion) take place in the weld pool due to various ionization properties of alternate gases supply. The technology of alternate shielding gas supply will improve the strength of the weld metal, welding speed, ductility and reduce crack, porosity, of the welding processes.