Quasi-viscous deformation mode in nonequilibrium nanocrystalline structures

Abstract 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.