Atomic-level study of twin nucleation from face-centered-cubic/body- centered-cubic interfaces in nanolamellar composites

W. Z. Han, J. S. Carpenter, J. Wang, I. J. Beyerlein, N. A. Mara

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Abstract

We report deformation twinning in Cu within accumulative roll-bonded Cu-Nb nanolamellar composites. Twins appear connected to the Nb{112}//Cu{112} interface with the Kurdjumov-Sachs orientation relationship, which we show to be ordered and faceted. The interface adopts a different faceted structure after twinning. Our analysis suggests that deformation twinning involves facet dissociation and slip-transfer from the Nb layer to the Cu layer due to a geometrically favorable slip transmission pathway.

Original languageEnglish (US)
Article number011911
JournalApplied Physics Letters
Volume100
Issue number1
DOIs
StatePublished - Jan 2 2012

Bibliographical note

Funding Information:
This work is partially sponsored by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Energy Frontier Research Center (EFRC) under Award No. 2008LANL1026, and by the Los Alamos National Laboratory Directed Research and Development (LDRD) project DR20110029. The authors thank Dr. S. N. Luo, Dr. R. F. Zhang, Dr. K. Kang and Dr. S. J. Zheng for stimulating discussions.

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