Particle-stimulated nucleation of recrystallization in copper-silver alloys containing silica particles has been studied by high-voltage electron microscopy. Both bulk annealed and in situ annealed specimens have been examined and the results compared with those obtained from similar studies of deformed aluminium. Recrystallization nuclei were seen to develop by subgrain recovery in regions close to particles with high dislocation densities and large subgrain misorientations. The initial growth rates were often enhanced by nucleus twinning. Selected-area diffraction experiments established the orientation of the recrystallized grains with respect to the deformed structure.
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