Feasibility of inconel and carbon steel dissimilar welded joint

Abstract

This study investigates the weldability, microstructural evolution, and tensile performance of six different welded joint configurations involving Inconel 718 (IN) and AISI 1018 carbon steel (CS). The tensile results show significant variation across the joints. Optical microscopy revealed dendritic weld structures in IN‑rich zones, ferrite–pearlite transformations in CS HAZ, and heterogeneous solidification patterns where filler–substrate mismatch was high. The originality of this work lies in its direct comparison of similar and dissimilar IN–CS joints using two filler metals, correlating mechanical performance with dilution effects, dendritic morphology, and trends in carbide/Laves phase formation.