Welding duplex stainless steels

摘要

Duplex stainless steels have a two-phase microstructure containing ferrite and austenite in volumetric fractions approximately equal to 50%. Due to their two-phase microstructure, these steels combine the best properties of ferritic and austenitic stainless steels. In general, the ferrite phase (body-centered cubic lattice) provides high mechanical strength, good toughness, and good corrosion resistance while the austenitic phase (face-centered cubic lattice) provides good ductility.