Microstructure and mechanical properties of stable austenitic steel after thermomechanical treatment

The features of microstructure and mechanical properties of stable austenitic steel after thermomechanical treatment consist of low-temperature deformation, warm deformation and subsequent annealing have been investigated. It is shown that under these conditions in the steel direct (γ → α')- and inverse (α' → γ)-martensitic transformations are realized. As a result of the thermomechanical treatment submicrocrystalline structural states with a high density of micro- and nanotwins and localized deformation bands are formed. The yield strength of these structural states more than 3 times increases by the original value