Microstructure evolution during rolling of inert-gas condensed palladium

During cold-rolling of nanocrystalline Pd consolidated from clusters we observed a strong increase in stacking fault density, conclusive evidence for lattice dislocation activity. However, the absence of texture and the retention of an equiaxed grain shape even after large deformation suggested grain boundary sliding and grain rotation as concurring processes. The rate of tensile creep at 313 K and at low stress is in agreement with predictions for Coble creep. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.