Phase and chemical structure characterization in double sided TIG arc welding of HARDOX 450 and AISI 430 steel

Abstract

In this study, HARDOX 450 and AISI 430 grades are combined using double-sided tungsteninert gas (TIG) welding process. Microstructural properties of weld zone were evaluated withoptical microscope (OM), scanning electron microscope (SEM), energy dispersivespectroscopy (EDS), electron back scatter diffraction (EBSD), elemental mapping analysis.After tensile testing, fracture surface morphology was evaluated using SEM. The width anddepth of the weld seam increased with the increase in current. Carbon and chrome diffusiongradients were formed on the HARDOX 450 steel side by FSS in welded joints. Thecrystallographic plane was dominated by blue and, concentrated in the direction of {101},{001}, {111}.