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Direct Observations of Confined Layer Slip in Cu/Nb Multilayers

Published online by Cambridge University Press:  16 October 2012

Nan Li ,
Jian Wang ,
Amit Misra  and
Jian Yu Huang
Nan Li*
Affiliation:
Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
Jian Wang
Affiliation:
Materials Science and Technology Division, MST-8, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
Amit Misra
Affiliation:
Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
Jian Yu Huang
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, USA
*
*Corresponding author. E-mail: [email protected]
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Abstract

In situ nanoindentation of a 30 nm Cu/20 nm Nb multilayer film in a transmission electron microscope revealed confined layer slip as the dominant deformation mechanism. Dislocations were observed to nucleate from the Cu-Nb interfaces in both layers. Dislocation glide was confined by interfaces to occur within each layer, without transmission across interfaces. Cu and Nb layers co-deformed to large plastic strains without cracking. These microscopy observations provide insights in the unit mechanisms of deformation, work hardening, and recovery in nanoscale metallic multilayers.

Keywords

confined layer slipin situ indentationCu-Nb interfaces
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 18 , Issue 5 , October 2012 , pp. 1155 - 1162
Copyright
Copyright © Microscopy Society of America 2012

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