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Gamma-channel stabilization mechanism in Ni-base superalloys
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.