The formation energies, dipole forces and crystallographic characteristics of point defects (vacancies, self-interstitials) - as elastic dipoles of various symmetries - were defined for body-centered cubic crystals by means of computer simulations; using modified interatomic interaction potentials. The stress fields and energy factors of screw, mixed (45°) and edge dislocations on the basic slip systems, <111>{110}, were calculated within the framework of the anisotropic theory of elasticity. The elastic interaction energies of the point defects and dislocations were calculated, and the influence of these interactions (especially for vacancies via their saddle-point positions) upon formation energies, crystallographic configurations (stable and unstable) and diffusion paths of point defects was shown. Critical densities of dislocations were defined; at which their stress fields controlled the thermal mobility of point defects throughout the whole crystal volume.

Influence of Stress Fields of Dislocations on Formation and Spatial Stability of Point Defects (Elastic Dipoles) in V and Fe Crystals. A.B.Sivak, V.A.Romanov, V.M.Chernov: Journal of Nuclear Materials, 2003, 323[2-3], 380-7