Magnetic domain characterisation of duplex stainless steel after different treatments

► Characterisation of magnetic domains of DSS after different treatments ► The domain structure of DSS is maze-like with spikes, like that of Fe-Ga alloys. ► The maze-like structure is an artefact in Fe-Ga alloys, but not in DSS. ► Effects of deformation and spinodal decomposition on domain structure are similar. ► But effects of deformation and spinodal decomposition on dislocations are different.