Non-Equilibrium State and Recovery of Grain Boundary Structure

The non‐equilibrium state of high‐angle grain boundary structure caused by the presence of grain boundary defects of dislocation nature is analysed. Such a state is characterized by the presence of long‐range elastic fields of the boundary and/or by mechanical instability of the grain boundary structure. The creation of a non‐equilibrium grain boundary structure and its recovery to an equilibrium one is considered within the framework of the crystallogeometrical approach for the case of interaction between lattice dislocations and grain boundaries. [Russian Text Ignored].