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Probing Crystal Plasticity at the Nanoscales - Synchrotron X-ray Microdiffraction (Paperback, 2015 ed.)
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Probing Crystal Plasticity at the Nanoscales - Synchrotron X-ray Microdiffraction (Paperback, 2015 ed.)
Series: SpringerBriefs in Applied Sciences and Technology
Expected to ship within 10 - 15 working days
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This Brief highlights the search for strain gradients and
geometrically necessary dislocations as a possible source of
strength for two cases of deformation of materials at small scales:
nanoindented single crystal copper and uniaxially compressed single
crystal submicron gold pillars. When crystalline materials are
mechanically deformed in small volumes, higher stresses are needed
for plastic flow. This has been called the "Smaller is Stronger"
phenomenon and has been widely observed. studies suggest that
plasticity in one case is indeed controlled by the GNDs (strain
gradient hardening), whereas in the other, plasticity is not
controlled by strain gradients or sub-structure hardening, but
rather by dislocation source starvation, wherein smaller volumes
are stronger because fewer sources of dislocations are available
(dislocation starvation hardening).
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