A method was proposed for the evaluation of the glide plane resistance which opposed the propagation of dislocation groups in a concentrated solid solution. The method was based upon measurements of the positions of dislocations, as observed in a relaxed pile-up. Two types of material were investigated. These were single crystals of the γ phase of MC2 super-alloy, and a model alloy having this phase's composition. At 500C, the glide plane resistance (which exceeded the yield stress) arose from contributions due to solid-solution hardening and, even more, from the ordering of these materials. The contributions which arose from short-range and long-range order could be distinguished.

Friction Stresses in the γ Phase of a Nickel-Based Superalloy M.Jouiad, N.Clément, A.Coujou: Philosophical Magazine A, 1998, 77[3], 689-99