Structural-Phase Evolution of Quenched Low-Activation Ferritic–Martensitic Steel in Dependence of the Temperature of Isothermal Holding

This paper is devoted to the investigation of the effect of nitrogen and carbon content, as well as different temperatures of isothermal holding,—on the structural-phase state evolution of the quenched low-activation 12% chromium ferritic–martensitic steel. Basic temperature ranges within which the structural-phase state of the quenched steel changes upon heating have been found using the differential scanning calorimetry technique. Correlations between changes in the fine atomic structure of steel and structural-phase transformations during isothermal heating have been established by Mossbauer spectroscopy.