Gamma-channel stabilization mechanism in Ni-base superalloys
J. V. Görler, S. Brinckmann, O. Shchyglo, I. Steinbach.
Philosophical Magazine Letters, 95, 519-525, (2015)
A mechanism is presented which opposes coalescence of -precipitates in Ni-base superalloys. The mechanism is based on the non-linear behaviour of the elastic energy in -channels, caused by the misfit strain between matrix and precipitate, as a function of the channel width. Variation of the channel width causes a disjoining pressure dependent on the density of misfit dislocations.