Kinetic modelling of flow stress of metals and alloys processed by severe plastic deformation

Basing on the kinetic modeling, the quantitative evaluations of activity of mechanisms, affecting the strength properties to explain the deviations from the Hall-Petch law towards the greater side in the area of small grains, have been made. The income of each strengthening mechanisms has been evaluated. It has been shown that the grain size and the pinning of dislocations by Mg atoms in the grain boundaries area are the main factors that enhance the alloy strength. The obtained results can be helpful for predicting the mechanical properties of materials.