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Dislocations, Mesoscale Simulations and Plastic Flow$
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Ladislas Kubin

Print publication date: 2013

Print ISBN-13: 9780198525011

Published to Oxford Scholarship Online: May 2013

DOI: 10.1093/acprof:oso/9780198525011.001.0001

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Applications of DD Simulations

Applications of DD Simulations

(p.181) 5 Applications of DD Simulations
Dislocations, Mesoscale Simulations and Plastic Flow

Ladislas Kubin

Oxford University Press

This chapter presents an overview of significant insights or contributions to modelling provided by three-dimensional dislocation simulations. Four main domains are concerned. A connection has been established between elementary dislocation–dislocation interactions and strengthening mechanisms at the scale of bulk specimens. Simulations of dislocation interactions with point defects and small clusters are now reaching maturity. Simulations of precipitation strengthening are quite accurate, and this domain deserves more attention. Large-scale simulations provide unique insights into collective dislocation processes. The areas concerned are dislocation avalanches, dislocation patterns in monotonic and cyclic deformation, dislocation-based continuum modelling and deformation at high strain rates. The understanding of size effects in small-scale materials—in particular, epitaxial semiconductor layers, thin metallic films and micro- and nanopillars—has improved continuously through a synergy between experiment, simulations and modelling. The chapter closes with a short prospective.

Keywords:   dislocation strengthening, small-scale defects, precipitation strengthening, collective processes, meso–macro modelling, size effects, epitaxial layers, thin films, small-scale pillars

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