Mössbauer spectroscopy study of ferritic steel subjected to severe plastic deformation process

Mössbauer spectroscopy was used to study the change of the magnetic field of iron atoms in ultrafine-grained low carbon ferritic steel. Particular attention was paid on the effect of impurities on the shift of Mössbauer peaks. From the change of Mössbauer subspectrum, it can be concluded that a non-equilibrium grain boundary region is developed within the ultrafine-grained ferritic steel during severe plastic deformation process.