Recently, low-frequency internal friction measurements on a series of Fe-Cr alloys by Konstantinović & Terentyev (2009) had demonstrated that increasing Cr concentrations led 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 showed alloy softening. It was argued that both phenomena were due to the same process: the influence of foreign atoms upon the transformation of the cores of a0/2<111> 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