Ultrasonic Characterisation of Heat Treated Tungsten Alloys used for TIG welding

Tungsten inert gas (TIG) welding, also called as gas tungsten welding (GTAW), use tungsten electrode for arcing.The tungsten alloy electrode is subjected to various temperature ranges during the welding process based on the welding time, welding current, welding pulse etc. Ultrasonic velocity for tungsten alloy test coupons held at 1500 deg C for 20, 40 and 60 minutes and at 1000 deg C, 1200deg C and 1500 deg C for 40 minutes period , were found to be strongly influenced by the elastic constants.Elastic constants shows better correlation with longitudinal velocity than shear velocity.