Efecto de la corriente pulsada en el proceso de soldadura GTAW en titanio 6Al4V con y sin metal de aporte

In this work the influence of the current is determined, the pulsed current with 20 and 50 Hz frequency in the mechanical properties, microstructure and wide lace GTAW (Gas Tungsten Arc Welding) welding process 6AL4V titanium 1.6 mm thick. Full factorial design experiments with three replicates was perform. In the experimental design factors such as the use of input and frequency they were analyzed. Two metal levels for the contribution factor whose maximum level is the use of input and minimal unused filler were considered. In the case of the frequency, three levels were use as minimum is DC, 20 Hz is a central and 50 Hz as maximum level. Mechanical tensile tests performed 500 g Vickers microhardness and macro and micrographs of the welded joints. It was found that the mechanical properties of the affected joint are significantly (P < 0.05 value) with respect to frequency using both filler metal and without the use of this. The face width and root decreased when a change of current at 20 Hz occurred, while 20 to 50 Hz do not show a significant change.