A theory describing the effect that impurities had on the regularities of the plastic deformation of crystals in terms of dynamic strain aging was developed. This theory was a combination of two models, one of which described the immobilization kinetics of individual dislocations due to the entrainment of impurities, while the second considers the collective dynamics of the dislocation ensemble. The unified model proposed here made it possible to calculate the concentration and temperature dependences of the contribution that impurity atoms made to the flow stress. This theory explains the anomalous temperature dependence of the yield stress, which was experimentally observed in a number of materials.

On Hardening of Crystals by Immobilization of Dislocations Due to Mobile Impurities. B.V.Petukhov: Crystallography Reports, 2011, 56[1], 61-6