The creep behavior and dislocation sub-structures were investigated as a function of strain for 2 solid-solution alloys, and for the pure components. The creep characteristics of the alloys were in good agreement with the creep behavior which was observed in other ionic and class-I metallic solid-solution alloys in which the creep rate was controlled by a viscous dislocation glide process. The creep resistance of the alloys was higher than that for the pure components at a given homologous temperature. The dislocation sub-structures of the alloys and pure components, at large strains, consisted of well-defined sub-grains. Sub-grain formation shifted to larger strains in the alloys, as compared with the pure components, due to solute drag forces on the dislocations during glide.

J.Wolfenstine, J.H.Shih: Journal of Materials Science, 1994, 29[23], 6199-206