Based on the analysis of the elastic-stressed state of partial disclinations of nanodipoles the rate of the quasi-viscous deformation mode in nanocrystalline structures is estimated. It’s shown that velocity of movement of point defects (V) and nanodipole propagation ( L ˙ ) within the quasi-viscous deformation mechanism, depending on the activation energy of the migration of point defects (vacancies, interstitial atoms) and deformation temperature, can reach high values close to the speed of sound in metals.

Disclination models of grain boundaries in crystals are considered. The features of the spatial distribution of the configuration stress fields depending on number of disclinations and magnitude of the common Frank’s vector are described. The estimate of the energy of the configurations based on the calculations in a wide range of values of the bending-torsion tensor 0.2…1.8 degrees per nanometer was obtained. It was shown that the energy of the equidistant model is higher than the energy of the other two with irregular distribution of disclinations.

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