Analysis of Dissimilar Welding Joint between Inconel 718 and AISI 316L by GTAW Multipass Process

Abstract: AISI 316L steel and Inconel 718 are metals of wide application in industries. The study dissimilar welding between these two materials is technologically important to improve their joint performance. We focused this on the evaluation weldability materials. Three samples welded using a multipass GTAW (Gas Tungsten Arc Welding) process with different parameters were analyzed. microstructural characterization, measurements volumetric fraction δ ferrite Laves phase, spacing austenite dendrites, addition measurement analysis dimensions zones microhardness performed. weld metal dendrite showed that higher heat inputs increased dilution dendrites. decreased increase input, while phase increased. presented significant variation pool due changes phases composition, as evidenced by EDS joints.