This paper presents the results of a study aimed at establishing the temperature distribution during the welding of magnesium alloy sheets by Pulsed Current Gas Tungsten Arc Welding (PCGTAW) and Constant Current Gas Tungsten Arc Welding (CCGTAW) processes. Pulsing of the GTAW welding current influences the dimensions and solidification rate of the fused zone, it also reduces the weld pool volum...

HUNDREDS OF THOUSANDS of people work in welding, cutting and brazing. It is estimated that welders compose 1 to 2% of the U.S. working population, including a significant segment of the aging workforce. According to OSHA’s Christine Petitti, the most commonly used welding processes are: 1) Flux-cored arc welding (FCAW). This process uses an arc between a continuous filler metal electrode and th...

In order to clarify the relationship between shielding gas flow and shieldability during a lap-fillet arc welding, oxygen concentration measurements on water-cooled copper which imitated lap-joint in tungsten inert welding were conducted. Moreover, high-speed plasma visualized by schlieren method observation using tube electrode xenon gas, respectively. As result, low-oxygen region, where was l...

Abstract Hastelloy C-276 is a nickel-based alloy with high strength and corrosion resistance at cryogenic to temperatures. The issue of shallow penetration by Tungsten Inert Gas (TIG) welding was addressed in the current investigation applying A-TIG variable oxide flux. In investigation, constant conditions were used perform TIG using SiO 2 , TiO 50% mixture + weld bead width depth profile meas...

Plasma optical spectroscopy and laser-induced breakdown (both on off-line) are used in this work to analyze the effects of different perturbations applied a tungsten inert gas welding process. This approach enables analysis comparison spectra acquired with two setups, thus providing more information about process evolution dynamics resulting chemical composition seams. It will be demonstrated t...