Journal
MRS BULLETIN
Volume 34, Issue 3, Pages 167-172Publisher
SPRINGER HEIDELBERG
DOI: 10.1557/mrs2009.47
Keywords
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Funding
- NSF [0653769, 0758265, 0758554, 0825435, 0728069]
- AFOSR, ONR [N00014-05-1-0504]
- Ohio Supercomputer Center
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [GRANTS:13845851, 0653769, 0758265] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0728069, GRANTS:13907391, 0825435, 0758554] Funding Source: National Science Foundation
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Recent experiments on nanoscale materials, Including nanowires, nanopillars, nanoparticles, nanolayers, and nanocrystals, have revealed a host of ultra-strength phenomena, defined by stresses in the material generally rising up to a significant fraction of the ideal strength-the highest achievable strength of a defect-free crystal. This article presents an overview of the strength-controlling deformation mechanisms and related mechanics models in ultra-strength nanoscale materials. The critical role of the activation volume Is highlighted in understanding the deformation mechanisms, as well as the size, temperature, and strain rate dependence of ultra strength.
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