The Role of Cr Atoms on the Annealing Kinetics of Deformed Cr 25%-Type Steel Alloy

Isochronal annealing experiments in the temperature range from 25 to 800 °C of cold-worked Cr 25%-type steel alloy reveal the existence of two annealing stages V and VI by observing the associated changes in magnetic coercivity (H_cr). The recovery stage V is found to be activated by an energy of 1.8 eV and is attributed to the dissociation of carbon–vacancy pairs. The value of the binding energy between carbon atom and vacancy is calculated and is found to be 0.7 eV. The second recovery stage VI appears above 450 °C, activated by 3 eV and is related to the climb motion of dislocations during the recrystallization process.