GRAIN SIZES AND DISLOCATION DENSITIES IN AUSTENITIC STEELS WITH DYNAMICALLY AND POST-DYNAMICALLY RECRYSTALLIZED MICROSTRUCTURES

Structural steels and alloys are commonly subjected to various thermomechanical treatments, which result in required combinations of mechanical properties of semiproducts owing to appropriate microstructures. The grain size and the dislocation density are two of the most important microstructural parameters affecting the mechanical properties of metallic materials. The aim of a part of this study is to elaborate the relationship between the deformation conditions within the warm to hot working domain and the deformation grain size and dislocation density by using our current results on a mediumMn austenitic steel with a reference to other alloys with fcclattices and relatively low stacking fault energies.