Shear strengths of FCC-FCC cube-on-cube interfaces

This work employs in-situ transmission electron microscopy based nanopillar compression of physical vapor deposited multilayers to measure the-interfacial shear strengths of model Ag-Pd, Ag-Au, Ag-Ni, Ag-Cu, and Cu-Ni (111) oriented cube-on-cube interfaces. The experimental trends are primarily rationalized by considering the coherency regimes. Coherent interfaces shear via slip transmission across them. Pillars containing semi coherent interfaces with <5% atomic misfit deform rather homogeneously. Interfaces exhibiting atomic misfit >5% shear locally and their interfacial shear strength decreases with increasing misfit. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.