Recent low-frequency internal friction measurements on a series of Fe-Cr alloys have demonstrated that increasing Cr concentrations lead to an increase in the strength of the β-relaxation at the cost of the γ-relaxation (Chambers' notation). In the same concentration and temperature regime, the alloys show alloy softening. It was argued that both phenomena were due to the same process, namely the influence of foreign atoms on the transformation of the cores of a0〈111〉/2 screw dislocations from their low-temperature configuration, capable of forming kink pairs on {110} planes, to their high-temperature configuration with kink-pair generation on {211} planes.

Dislocation Relaxation and Alloy Softening of BCC Alloys. A.Seeger: Philosophical Magazine Letters, 2010, 90[10], 699-706