Microstructure and Textures of Ods Ferritic Alloys Obtained by Mechanical Alloying

The microstructure of two commercial alloys MA956 and MA957 obtained by mechanical alloying has been investigated. These Oxide Dispersion Strengthened (ODS) ferritic materials display particular microstructures and behaviours under heat treatments. Recrystallization phenomena depends on a lot of material processing parameters.Typical rnicrostructures consist of elongated grains with thickness of about or less than 1 (im (fine grained) or higher than 100 |jim(coarse grained structure). These anisotropic grain structures show very strong textures. In this paper we discuss the recrystallization conditions of samples at hot and coldworked starting conditions. The preliminary results concerning the deformation textures developed by both materials during hot and cold working are also presented.