期刊
APPLIED PHYSICS LETTERS
卷 102, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4793481
关键词
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资金
- Air Force Office of Sponsored Research (AFOSR) YIP [FA9550-09-1-0084]
- Air Force Research Laboratory [AFRL FA8650-07-2-5061]
- NSF [DMR-1128818, CMMI-0928297]
- NSF-MRSEC [DMR-0819885]
- Korea Institute of Machinery Materials
- Department of Energy Office of Nuclear Energy University Programs (NEUP)
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1128818] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0928297] Funding Source: National Science Foundation
We measure the strain rate dependence of 0.2% offset yield stress in single-crystal nickel nanowires with diameters ranging from 80 to 300 nm. In situ tensile experiments with strain rates from 10(-4) s(-1) to 10(-2) s(-1) were conducted, and the small activation volume (similar to 10b(3), where b is the Burgers vector length) and high strain-rate sensitivity (similar to 0.1) were obtained. These results agreed with atomistic simulations. Our work provides insights into the strength-limiting and rate-controlling mechanism of plasticity at the nanoscale. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793481]
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