Abstract
Differences in the thermal stability of trapped lattice dislocations in interphase boundaries and grain boundaries in austenitic–ferritic steel have been studied. It was found that the distribution of diffusional properties of α/γ interphase boundaries depends on the mutual orientation of phases and differs significantly from the distribution of diffusional properties of α/α and γ/γ grain boundaries, which stems from the fact that interphase boundaries include a substantial fraction of boundaries of particularly low diffusivity. These are interfaces of austenite grains which nucleated inside ferritic grains and demonstrate Kurdjumov–Sachs or Nishiyama–Wassermann relationship with respect to the ferritic matrix.MST/1005
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