Unique Features of Ultrafine-Grained Microstructures in Materials Having Low Stacking Fault Energy
The evolution of the microstructure during processing by equal-channel angular pressing (ECAP) in silver having extremely low stacking fault energy was studied up to 16 passes. It was shown that at high strains the contribution of twinning to deformation increased at the expense of dislocation-controlled processes. It was also found that during storage at room temperature (i.e. at the temperature of ECAP) there was a self-annealing of the severely deformed microstructure after 1 month and its degree was revealed to have a strong dependence on the number of passes.
P. J. Szabó and T. Berecz
J. Gubicza et al., "Unique Features of Ultrafine-Grained Microstructures in Materials Having Low Stacking Fault Energy", Materials Science Forum, Vol. 659, pp. 171-176, 2010