Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-24T19:04:07.217Z Has data issue: false hasContentIssue false
  • English
  • Français

Uniaxial Compression Behavior of Bulk Nano-twinned Gold from Molecular Dynamics Simulation

Published online by Cambridge University Press:  01 February 2011

Chuang Deng  and
Frederic Sansoz
Chuang Deng
Affiliation:
[email protected], University of Vermont, School of Engineering, Burlington, VT, 05482, United States
Frederic Sansoz
Affiliation:
[email protected], University of Vermont, School of Engineering, Burlington, VT, 05482, United States
Get access

Abstract

Parallel molecular dynamics simulations were used to study the influence of pre-existing growth twin boundaries on the slip activity of bulk gold under uniaxial compression. The simulations were performed on a 3D, fully periodic simulation box at 300 K with a constant strain rate of 4×107 s−1. Different twin boundary interspacings from 2 nm to 16 nm were investigated. The strength of bulk nano-twinned gold was found to increase as the twin interspacing was decreased. However, strengthening effects related to the twin size were less significant in bulk gold than in gold nanopillars. The atomic analysis of deformation modes at the twin boundary/slip intersection suggested that the mechanisms of interfacial plasticity in nano-twinned gold were different between bulk and nanopillar geometries.

Keywords

simulationnanostructureAu
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1049: Symposium AA – Fundamentals of Nanoindentation and Nanotribology IV , 2007 , 1049-AA08-05
Copyright
Copyright © Materials Research Society 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Greer, J. R, Oliver, W. C and Nix, W. D, Acta Mater. 53,1821 (2005).Google Scholar
2 Greer, J. R and Nix, W. D, Phys. Rev. B 73,245410 (2006).Google Scholar
3 Volkert, C. A and Lilleodden, E. T, Phil. Mag. 86,5567 (2006).Google Scholar
4 Diao, J., Gall, K. and Dunn, M. L, Nano Lett. 4,1863 (2004).Google Scholar
5 Lin, J.-S., Ju, S.-P. and Lee, W.-J., Phys. Rev. B. 72,085448 (2005).Google Scholar
6 Hyde, B., Espinosa, H. D and Farkas, D., JOM September, 62 (2005).Google Scholar
7 Diao, J., Gall, K., Dunn, M. L and Zimmerman, J. A, Acta Mater. 54,643 (2006).Google Scholar
8 Rabkin, E. and Srolovitz, D. J, Nano Lett. 7,101 (2007).Google Scholar
9 Rabkin, E., Nam, H.-S. and Srolovitz, D. J, Acta Mater. 55,2085 (2007).Google Scholar
10 Afanasyev, K. A and Sansoz, F., Nano Lett. 7,2056 (2007).Google Scholar
11 Plimpton, S. J, J. Comp. Phys. 117,1 (1995); http://lammps.sandia.gov/Google Scholar
12 Grochola, G., Russo, S. P and Snook, I. K, J. Chem. Phys. 123,204719 (2005).Google Scholar
13 Hosford, W. F. Mechanical Behavior of Materials, Cambridge University Press (2005)Google Scholar
14 Zhu, T., Li, J., Samanta, A., Kim, H. G and Suresh, S., Proc. Natl. Acad. Sci. U. S. A. 104,3031 (2007).Google Scholar
15 Lu, L., Shen, Y., Chen, X., Qian, L. and Lu, K., Science 304,422 (2004).Google Scholar