Influence of chemical composition on the evolution of texture in 441 ferritic stainless steels

Abstract

The influence of addition of Nb+Ti (0.26 to 0.7wt%Nb and 0.15 to 0.3wt%Ti) to 441 on the development of annealing crystallographic textures was investigated by XRD and EBSD ODFs. It was found that addition of (Nb+Ti) to 441 improved the {111} texture to a limit while the resistance to ridging continued improving with more additions of Ti and Nb. It was found that the TiN nucleates heterogeneously first on the MgO.Al 2 O 3 spinel and followed by Nb(C,N) on the TiN particle. The improvement in ridging was attributed to particle stimulated nucleation (PSN) of randomly oriented grains caused by these coarse compound particles.