Present manufacturing processes require welding with adequate strength in the welded joints and excellent weld
quality with reduced defects in the samples. To make effective use of this Autogenous TIG welding,arc oscillation technique such
as pulsed current TIG welding with optimal current parameters is required to achieve desired weld properties. The experiment
involves the study of mechanical properties and fractography of pulsed current TIG(PCTIG), constant current TIG(CCTIG) and
Mixed mode TIG(MMA) welded 99.5% pure P/M Aluminium specimens processed through Equi channel angular
pressing(ECAP). The specimens were initially processed through powder metallurgy route followed by an intermediary hot
extrusion process to achieve a reduction in diameter as well as densification of the compact. The ECAP process was then carried
out at optimum die parameters of channel angle 1100
and corner angle 700 through route A for 2 passes.
