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Ideal Shear Strengths of fcc Aluminum and Copper
Abstract
The ideal shear strength is the minimum stress needed to plastically deform an infinite dislocation-free crystal and is an upper bound to the strength of a real crystal. We calculate the ideal shear strengths of Al and Cu at zero temperature using pseudopotential density functional theory within the local density approximation. These calculations allow for structural relaxation of all five strain components other than the imposed shear strain and result in strengths on ${111}$ planes of 1.85 and 2.65 GPa for Al and Cu, respectively ( $8%$-- $9%$ of the shear moduli). In both Al and Cu, the structural relaxations reduce the ideal shear strengths by $35%$ to $45%$, but the directions of relaxation strain in each are qualitatively different.
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Cites
Self-interaction correction to density-functional approximations for many-electron systems
Perdew, J. P., & Zunger, A. (1981) · Physical Review B · doi:10.1103/physrevb.23.5048 · Cited by 20,887
Cited by
Quantifying the early stages of plasticity through nanoscale experiments and simulations
Van Vliet, K. J., Li, J., Zhu, T., Yip, S., & Suresh, S. (2003) · Physical Review B · doi:10.1103/physrevb.67.104105 · Cited by 391
Metadata
- Authors
- Roundy, D., Krenn, C. R., Cohen, M. L., & Morris, J. W.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1999-03-29
- Volume
- 82
- Issue
- 13
- Pages
- 2713-2716
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1976325808
- Cited by
- 483
- References
- 1
- FWCI
- 5.15
- Type
- journal article
- Language
- en
- Open access
- closed
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- Roundy, D., Krenn, C. R., Cohen, M. L., & Morris, J. W. (1999). Ideal Shear Strengths of fcc Aluminum and Copper. Physical Review Letters. https://doi.org/10.1103/physrevlett.82.2713
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