The influence of elastic anisotropy on interaction of dislocations with point defects in BCC metals

With the use of the anisotropic theory of elasticity the energies and the force‐distance profiles for the interaction of various types of straight dislocations with point defects of intrusion (atoms of N, C or O) and of replacement in BCC metals with a different degree of elastic anisotropy (Nb, V, Ta, α‐Fe) have been calculated. The calculated force‐distance profiles in most cases are not centrally symmetric, that leads up to a gliding asymmetry at the direct and reverse directions of dislocation motion. The crystal elastic anisotropy can change the relative mobility of dislocations of various types and accounts for a number of experimentally observed peculiarities of BCC metals stress‐strain properties.