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Size effects in the deformation of sub-micron Au columns
Open accessAbstract
Uniaxial compression tests have been performed on single crystal Au columns ranging in diameter from 180 nm to 8 µm. The columns were machined into the surface of a large-grained Au sheet using a focused ion beam microscope and then mechanically tested using a nanoindenter outfitted with a flat diamond punch. Images of the compressed columns show that deformation occurs by localized shear on the slip systems with the largest resolved shear stresses. After an elastic loading regime, the columns exhibit yielding in discrete strain bursts. The compressive yield stress scales roughly as the inverse square root of the column diameter. The apparent strain hardening rate also increases strongly with decreasing column diameter and stresses as large as 1 GPa are reached. Both of these size effects are attributed to dislocation source-limited behaviour in small volumes.
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Cited by
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Plasticity in Confined Dimensions
Kraft, O., Gruber, P. A., Mönig, R., & Weygand, D. (2010) · Annual Review of Materials Research · doi:10.1146/annurev-matsci-082908-145409 · Cited by 429
Dehm, G., Jaya, B. N., Raghavan, R., & Kirchlechner, C. (2018) · Acta Materialia · doi:10.1016/j.actamat.2017.06.019 · Cited by 382
An, B. W., Gwak, E.-J., Kim, K., Kim, Y.-C., Jang, J., Kim, J.-Y., & Park, J.-U. (2016) · Nano Letters · doi:10.1021/acs.nanolett.5b04134 · Cited by 308
Valdevit, L., Jacobsen, A. J., Greer, J. R., & Carter, W. B. (2011) · Journal of the American Ceramic Society · doi:10.1111/j.1551-2916.2011.04599.x · Cited by 142
Metadata
- Authors
- Volkert, C. A., & Lilleodden, E. T.
- Venue
- Philosophical Magazine
- Publisher
- Informa UK Limited
- Published
- 2006-11-21
- Volume
- 86
- Issue
- 33-35
- Pages
- 5567-5579
- ISSN
- 1478-6433 (ISSN-L)
- 1478-6435
- 1478-6443
- OpenAlex
- W2027748950
- Cited by
- 727
- References
- 0
- FWCI
- 34.72
- Type
- journal article
- Language
- en
- Open access
- green
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