Nanoscale plasticity
نویسندگان
چکیده
منابع مشابه
Modelling Plasticity in Nanoscale Contact
The problem of mechanical contact is a truly multiscale one. Atomistic effects that violate continuum theory dominate the deformations of contacting asperities, while the interactions between distant asperities occur through long-range elasticity. This thesis concentrates on the numerical modelling of nanoscale frictional contact between crystalline metals by using both single-scale atomistic m...
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Stochastic, discontinuous flow is ubiquitous in the plastic deformation of small-volume metallic materials. We have identified a sizestrengthening effect on the stress to initiate the jerky plastic yielding in nanoscale volumes of copper single crystals, subjected to nanoindentation in different orientations. Such a nanoscale size effect arises due to the stochastic nature of dislocation source...
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We report the results of constant strain rate experiments on electroplated, single crystalline copper pillars with diameters between 75 and 525 nm. At slow strain rates, 10 3 s , pillar diameters with 150 nm and above show a size-dependent strength similar to previous reports. Below 150 nm, we find that the size effect vanishes as the strength transitions to a relatively size-independent regime...
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ژورنال
عنوان ژورنال: Nature Materials
سال: 2002
ISSN: 1476-1122,1476-4660
DOI: 10.1038/nmat718