In alloys which were deformed by 20%, at temperatures of between 270 and 318C, the activation energy of 80kcal/mol decreased to 24kcal/mol at temperatures of up to 400C. With increasing temperature, the permeation decreased and the activation energy increased to 37kcal/mol. This dependence of permeation and diffusivity upon temperature was attributed to formation of the K-state and to a change in the degree of ordering during the tempering of quenched samples and the annealing of deformed alloys.

V.A.Goltsov, P.V.Geld, V.J.Kosheleva, J.P.Simakov: Uchen. Zap. Permsk. Univ., 1968, 194, 110-6

Figure 19

Diffusivity of H in Fe-Cr

(a: 0at%Cr, b: 0.4at%Cr, c: 0.9at%Cr, d: 2.84at%Cr, e: 5.1at%Cr)