ABSTRACT
ABSTRACT: In this study, 3 mm thick plates of AISI 316L austenitic stainless steel and High Strength Low Alloy (HSLA) steel were dissimilar GTA welded and the tensile strength and microstructural properties were investigated. The experimental trials were carried out as per the Taguchi design and the welding current, welding speed, wire feed rate and filler material were selected as the parameters. The results showed that the highest joint strength of 610 MPa was obtained at welding current of 100 A, welding speed of 9 cm/min and wire feed rate of 1.6 m/min with 304 steel as the filler material. ANOVA revealed that the welding current and wire feed rate are the most significant and least significant parameters, respectively. The regression model showed that the welding speed and filler material and the welding current and wire feed rate have interaction effect on the tensile strength of the joints.
