A Hadadzadeh - Department of Materials Science and Engineering, Sharif University of Technology, MS Student
M.M Ghaznavi - Department of Materials Science and Engineering, Sharif University of Technology, PhD Student
A.H Kokabi - Department of Materials Science and Engineering, Sharif University of Technology. Professor

In order to evaluate the influence of pulsed current on the welded-joint strength, pulsed-TIG process was used to weld the A1-6Mg alloy is used strongly in aerospace structures. High strength of this alloy is dun to work hardening during manufacturing and existence of precipitates in its microstructure. During pulzed-TIG welding of this alloy, the effect of Time Ratio was studied on the welded-joint strength. To reach the maximum strength, Time Ratio had an optimum value which was equal to 1.6. At this Time Ratio the finest and the most uniform microstructure in the weld metal was achieved.

pulsed TIG- Time ratio- 5xxx series alloys