The effect of heat treatment and cold plastic deformation upon diffusion and permeation in Ni-(14 or 20)Cr and Ni-(0 to 25%)Mn was studied by using steady-state flow measurements. At 330 to 470C, the permeation in quenched Ni-Cr was similar to that in pure Ni. It decreased sharply at temperatures of between 470 and 650C (including a change in short-range order). Changes in permeation corresponded to changes in the electrical resistance of the Ni-Cr alloys. At temperatures above 750C, the permeation decreased but the activation energy was unaltered.

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