Atomic-scale investigation of interface-facilitated deformation twinning in severely deformed Ag-Cu nanolamellar composites

An, X. H., Zhu, S. M., Cao, Y., Kawasaki, M., Liao, X. Z., Ringer, S. P., Nie, J. F., Langdon, T. G. and Zhu, Y. T. (2015) Atomic-scale investigation of interface-facilitated deformation twinning in severely deformed Ag-Cu nanolamellar composites. Applied Physics Letters, 107 (1), 11901. (doi:10.1063/1.4926370).

Abstract

We report an atomic-scale investigation of interface-facilitated deformation twinning behaviour in Ag-Cu nanolamellar composites. Profuse twinning activities in Ag supply partial dislocations to directly transmit across the Ag-Cu lamellar interface that promotes deformation twinning in the neighbouring Cu lamellae although the interface is severely deformed. The trans-interface twin bands change the local structure at the interface. Our analysis suggests that the orientation relationship and interfacial structure between neighbouring Ag-Cu lamellae play a crucial role in such special interface-facilitated twinning behaviour.

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Contributors

Author: T. G. Langdon

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