Journal
ACTA MATERIALIA
Volume 138, Issue -, Pages 212-223Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2017.07.051
Keywords
Dislocations; Eutectic; In situ transmission electron microscopy (TEM); MD simulations; Interfaces
Funding
- US Department of Energy Office of Basic Energy Sciences, Division of Materials Science [DEFG-02-07ER46443]
- Army Research Office [W911NF-12-1-0548]
- Materials Research Science and Engineering Center at University of Wisconsin Madison [DMR-1121288]
- Nanoscale Science and Engineering Center at University of Wisconsin Madison [DMR-0832760]
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The mechanisms of strain transfer across Ag/Cu interfaces were determined by a combination of in situ and ex situ TEM straining experiments and molecular dynamics simulations. Minimizing the magnitude of the Burgers vector of the residual dislocation generated in the interface was the dominant factor for determining the outcome of dislocation and deformation twin interactions with both non-coherent twin and cube-on-cube interfaces. This included the unexpected finding, due to the loading condition, of deformation twin activation in the Cu layer due to the intersection of deformation twins in Ag with the interface. Deformation twin nucleation in Ag from the non-coherent twin interfaces was also explained by a Burgers vector minimization argument. Published by Elsevier Ltd on behalf of Acta Materialia Inc.
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