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A Maximum in the Strength of Nanocrystalline Copper
Abstract
We used molecular dynamics simulations with system sizes up to 100 million atoms to simulate plastic deformation of nanocrystalline copper. By varying the grain size between 5 and 50 nanometers, we show that the flow stress and thus the strength exhibit a maximum at a grain size of 10 to 15 nanometers. This maximum is because of a shift in the microscopic deformation mechanism from dislocation-mediated plasticity in the coarse-grained material to grain boundary sliding in the nanocrystalline region. The simulations allow us to observe the mechanisms behind the grain-size dependence of the strength of polycrystalline metals.
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Citations
Cited by
Zhu, Y., & Wu, X. (2023) · Progress in Materials Science · doi:10.1016/j.pmatsci.2022.101019 · Cited by 1,537
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Larsen, P. M., Schmidt, S., & Schiøtz, J. (2016) · Modelling and Simulation in Materials Science and Engineering · doi:10.1088/0965-0393/24/5/055007 · Cited by 1,121
Self-citationSize dependence of nanostructures: Impact of bond order deficiency
Sun, C. Q. (2007) · Progress in Solid State Chemistry · doi:10.1016/j.progsolidstchem.2006.03.001 · Cited by 873
Metadata
- Authors
- Schiøtz, J., & Jacobsen, K. W.
- Venue
- Science
- Published
- 2003-09-05
- Volume
- 301
- Issue
- 5638
- Pages
- 1357-1359
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1983543277
- Cited by
- 1,479
- References
- 0
- FWCI
- 37.09
- Type
- journal article
- Language
- en
- Open access
- closed
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- Schiøtz, J., & Jacobsen, K. W. (2003). A Maximum in the Strength of Nanocrystalline Copper. Science. https://doi.org/10.1126/science.1086636
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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