Mechanics of Ultra-Strength Materials

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...

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Bibliographic Details
Published in:MRS bulletin 2009-03, Vol.34 (3), p.167-172
Main Authors: Zhu, Ting, Li, Ju, Ogata, Shigenobu, Yip, Sidney
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Characterization and Evaluation of Materials
Crystal defects
Deformation mechanisms
Energy Materials
Materials Engineering
Materials Science
Mechanics (physics)
Nanotechnology
Nanowires
Strain rate
Technical Feature
Temperature dependence
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Summary: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.
ISSN:0883-7694
1938-1425
DOI:10.1557/mrs2009.47