Recrystallisation in High Nitrogen Alloyed Super Duplex Stainless Steel

Abstract

While the recrystallisation mechanisms and texture development of cold rolled single phase materials especially those of ferritic steels, and to lesser extent, those of austenitic steels are well known and investigated [1,2], the recrystallisation in duplex and super duplex stainless steels was much less subject of research, although these steels have become an attractive material for many applications, In the current study different (super) duplex stainless steels with various nitrogen contents from 0.15 up to 0.60wt% were cold rolled and subsequently annealed without precipitation. By means of microstructure investigations and texture measurements, it was possible to observe the recrystallisation behaviour of both phases (ferrite and austenite) and to elucidate the mechanisms involved in forming a new microstructure.