Influence of deformation parameters and initial grain size on the microstructure of austenitic steels after hot-working processes

Abstract

The achievements of stereology as regards a quantitative description of the shape and size of grains in polycrystalline materials were used in this study. This allowed undertaking an attempt at improving the models that describe the influence of hot-working parameters on the microstructure of steel. The research was conducted on samples of austenitic chromium–manganese and chromium–nickel steels subjected to hot deformation in a torsion plastometer. Some dependencies between the deformation process parameters, inhomogeneity and grain size, and the mechanical properties determined in a torsion test were developed. These data are important from the point-of-view of selection of the technological process parameters to guarantee the most beneficial final structure and properties of steel.