Analysis of Process Parameters on the Friction Stir Processed TIG Welded Aluminium Joint

Abstract

The present work explores the effect of various process parameters on friction stir processed Tig welded AA5083 aluminium joints. TIG welding was carried out with process parameters such as Gas flow rate, current rate and Filler wire diameter, whereas friction stir processing parameters were RPM, tilt angle and traversing speed. TIG welding parameters Gas flow rate, current rate and Filler wire diameter were varied between 10 to 14 Litre/minute, 130 to 160 A and 1.6 to 3.2 mm respectively. TIG welded aluminium alloys were subjected to various process parameters including various filler wires ER 4043, ER4047 and ER5356 in order to determine the optimised joint having least problems such as hot cracking, Porosity but couldn’t remove completely. Friction stir processing on TIG welded joint was introduced on the optimised TIG welded sample in order to reduce such unwanted defects and improve the mechanical properties such as microstructure, ultimate tensile strength and hardness. Friction stir processing has remarkably improved the mechanical properties.