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Source truncation and exhaustion: insights from quantitative in situ TEM tensile testing.

ABSTRACT: A unique method for quantitative in situ nanotensile testing in a transmission electron microscope employing focused ion beam fabricated specimens was developed. Experiments were performed on copper samples with minimum dimensions in the 100-200 nm regime oriented for either single slip or multiple slip, respectively. We observe that both frequently discussed mechanisms, truncation of spiral dislocation sources and exhaustion of defects available within the specimen, contribute to high strengths and related size-effects in small volumes. This suggests that in the submicrometer range these mechanisms should be considered simultaneously rather than exclusively.

SUBMITTER: Kiener D

PROVIDER: S-EPMC3172822 | biostudies-other | 2011 Sep

REPOSITORIES: biostudies-other

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Source truncation and exhaustion: insights from quantitative in situ TEM tensile testing.

Kiener D D Minor A M AM

Nano letters 20110801 9

A unique method for quantitative in situ nanotensile testing in a transmission electron microscope employing focused ion beam fabricated specimens was developed. Experiments were performed on copper samples with minimum dimensions in the 100-200 nm regime oriented for either single slip or multiple slip, respectively. We observe that both frequently discussed mechanisms, truncation of spiral dislocation sources and exhaustion of defects available within the specimen, contribute to high strengths ...[more]

PMID: 21793497

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