Plastična deformacija u bcc metalima

Similarity between the yield-stress versus temperature behaviour of solid solutions and that of pure body-centred cubic (bcc) metals suggests that the strength arising from the intrinsic lattice-friction in bcc metals may be viewed within the framework of the kink-pair model of solid-solution hardening in which the effect of alloying on the resistance to plastic deformation is considered rather akin to raising the Peierls barrier in metals. Recent experimental data on the yielding of high-purity single crystals of potassium and sodium between 1.5 and 300 K correlates well with the theoretical model.