Microstructural changes during deformation of AISI 300 grade austenitic stainless steels: Impact of chemical heterogeneity

• DOI: 10.1016/j.prostr.2016.06.288
• Publication Date: 2016-07-22T08:11:42Z
• Authors: Jiří Man; Ivo Kuběna; Marek Smaga; Ondřej Man; Antti Järvenpää; Anja Weidner; Zdeněk Chlup; Jaroslav Polák
• Keywords: Austenitic stainless steel; Embrittlement; Isotropic etching

The present work points out the importance of chemical heterogeneity on destabilization austenitic structure and formation deformation induced martensite (DIM) in AISI 300 grade stainless steels (ASSs) different level austenite stability (316L, 304, 301LN). Color etching reveals that wrought Cr–Ni type is never fully chemically homogeneous. Confrontation distribution morphology DIM formed volume material after static cyclic straining under well controlled conditions with characteristic local variations composition diverse semi-product forms (plates, sheets, bars) proved prominent very important role banding originally structure. This fact should be considered especially when interpreting results hydrogen embrittlement tensile testing ASSs lowered Ni content. An impact microstructural changes during production UFG 301LN its highlighted.