Simulation of properties of dissimilar welded joints of duplex 2205 and austenitic 316l steels

The article presents the computer aided simulation of mechanical properties of dissimilar welded joints based on duplex 2205 and austenitic 316L stainless steels manufactured using austenitic binder. The purpose of researches was to analyze the impact of joint type and binder material on the mechanical properties of these welded joints. The duplex stainless steel has given its name to the similarity (in terms of processing and physical properties) to ferritic steels and (in terms of chemical composition and excellent corrosion resistance) to austenitic steels. The duplex family already includes more than 40 steel grades that are constantly being developed. The combination of chromium, molybdenum, nitrogen and tungsten provides corrosion resistance significantly better than in the case of acid-resistant steels according to AISI 314 standard, and additionally these steels are characterized by higher strength (at room temperature almost twice the tensile strength). The aim of the work is to develop a method for modeling welded welds in FEM calculations and numerical calculation methodologies that allow for the strength of such welds and their nonlinear properties.