Y. T. Zhu, X. Liao, S. G. Srinivasan, Y. Zhao, M. I. Baskes, Los Alamos National Laboratory, Los Alamos, NM; E. J. Lavernia, University of California, Davis, CA
Deformation twins and wide stacking faults have been experimentally found in nanocrystalline (NC) Al and copper. They were found formed by partial dislocations emitted from nano grain boundaries/domains. This work explores the formation and growth mechanisms of these twins and wide stacking faults. Theoretical modelling will be compared with experimental results to give an in-depth understanding on how the partial dislocations from grain boundaries form twins and wide stacking faults in fcc NC metals. It presents new critical pieces to the puzzle of deformation mechanisms in NC materials and provide insights into the mechanical properties of NC materials.
Summary: Deformation twins and wide stacking faults have been experimentally found in nanocrystalline (NC) Al and copper. They were found formed by partial dislocations emitted from nano grain boundaries/domains. This work explores the formation and growth mechanisms of these twins and wide stacking faults. Theoretical modelling will be compared with experimental results to give an in-depth understanding on how the partial dislocations from grain boundaries form twins and wide stacking faults in fcc NC metals. It presents new critical pieces to the puzzle of deformation mechanisms in NC materials and provide insights into the mechanical properties of NC materials.
