A Molecular Dynamics Study of the Effect of Voids on the Deformation Behavior of Nanocrystalline Copper

Zheng, Chen; Zhang, Yong-Wei

doi:https://doi.org/10.1155/2007/64589

Journal of Nanomaterials

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Research Article | Open Access

Volume 2007 | Article ID 064589 | https://doi.org/10.1155/2007/64589

A Molecular Dynamics Study of the Effect of Voids on the Deformation Behavior of Nanocrystalline Copper

Chen Zheng¹and Yong-Wei Zhang¹

Academic Editor: Jun Li

Received23 Jun 2007

Revised11 Aug 2007

Accepted24 Sept 2007

Published15 Nov 2007

Abstract

Molecular dynamics simulations are performed to study the effect of preexisting ellipsoidal voids on the tensile deformation behavior in nanocrystalline copper. No crack propagation is observed regardless of the orientation of the voids with respect to the tensile direction. However it is found that the voids may assist the shear plane formation via (1) emitting dislocations from the void tips, (2) relieving triple-junction confinement, and (3) catalyzing grain splitting.

References

H. Gleiter, “Nanocrystalline materials,” Progress in Materials Science, vol. 33, no. 4, pp. 223–315, 1989.
View at: Publisher Site | Google Scholar
C. Suryanarayana, “Nanocrystalline materials,” International Materials Reviews, vol. 40, no. 2, pp. 41–64, 1995.
View at: Google Scholar
D. H. Jeong, F. Gonzalez, G. Palumbo, K. T. Aust, and U. Erb, “The effect of grain size on the wear properties of electrodeposited nanocrystalline nickel coatings,” Scripta Materialia, vol. 44, no. 3, pp. 493–499, 2001.
View at: Publisher Site | Google Scholar
R. W. Siegel, “Mechanical properties of nanophase materials,” Materials Science Forum, vol. 235–238, pp. 851–860, 1997.
View at: Google Scholar
L. Lu, M. L. Sui, and K. Lu, “Superplastic extensibility of nanocrystalline copper at room temperature,” Science, vol. 287, no. 5457, pp. 1463–1466, 2000.
View at: Publisher Site | Google Scholar
P. G. Sanders, C. J. Youngdahl, and J. R. Weertman, “The strength of nanocrystalline metals with and without flaws,” Materials Science and Engineering A, vol. 234–236, pp. 77–82, 1997.
View at: Publisher Site | Google Scholar
P. G. Sanders, J. A. Eastman, and J. R. Weertman, “Elastic and tensile behavior of nanocrystalline copper and palladium,” Acta Materialia, vol. 45, no. 10, pp. 4019–4025, 1997.
View at: Publisher Site | Google Scholar
S. R. Agnew, B. R. Elliott, C. J. Youngdahl, K. J. Hemker, and J. R. Weertman, “Microstructure and mechanical behavior of nanocrystalline metals,” Materials Science and Engineering A, vol. 285, no. 1-2, pp. 391–396, 2000.
View at: Publisher Site | Google Scholar
S. van Petegem, F. Dalla Torre, D. Segers, and H. van Swygenhoven, “Free volume in nanostructured Ni,” Scripta Materialia, vol. 48, no. 1, pp. 17–22, 2003.
View at: Publisher Site | Google Scholar
P. G. Sanders, J. R. Weertman, and J. G. Barker, “Structure of nanocrystalline palladium and copper studied by small angle neutron scattering,” Journal of Materials Research, vol. 11, no. 12, pp. 3110–3120, 1996.
View at: Google Scholar
Y. M. Wang, K. Wang, D. Pan, K. Lu, K. J. Hemker, and E. Ma, “Microsample tensile testing of nanocrystalline copper,” Scripta Materialia, vol. 48, no. 12, pp. 1581–1586, 2003.
View at: Publisher Site | Google Scholar
H. Hahn and K. A. Padmanabhan, “A model for the deformation of nanocrystalline materials,” Philosophical Magazine B, vol. 76, no. 4, pp. 559–571, 1997.
View at: Publisher Site | Google Scholar
K. A. Padmanabhan, G. P. Dinda, H. Hahn, and H. Gleiter, “Inverse Hall-Petch effect and grain boundary sliding controlled flow in nanocrystalline materials,” Materials Science and Engineering A, vol. 452-453, pp. 462–468, 2007.
View at: Publisher Site | Google Scholar
Y. W. Zhang, P. Liu, and C. Lu, “Molecular dynamics simulations of the preparation and deformation of nanocrystalline copper,” Acta Materialia, vol. 52, no. 17, pp. 5105–5114, 2004.
View at: Publisher Site | Google Scholar
A. Hasnaoui, H. van Swygenhoven, and P. M. Derlet, “Dimples on nanocrystalline fracture surfaces as evidence for shear plane formation,” Science, vol. 300, no. 5625, pp. 1550–1552, 2003.
View at: Publisher Site | Google Scholar
A. Hasnaoui, H. van Swygenhoven, and P. M. Derlet, “Cooperative processes during plastic deformation in nanocrystalline fcc metals: a molecular dynamics simulation,” Physical Review B, vol. 66, no. 18, Article ID 184112, 8 pages, 2002.
View at: Publisher Site | Google Scholar
J. Schiøtz, F. D. Di Tolla, and K. W. Jacobsen, “Softening of nanocrystalline metals at very small grain sizes,” Nature, vol. 391, no. 6667, pp. 561–563, 1998.
View at: Publisher Site | Google Scholar
H. van Swygenhoven, A. Caro, and D. Farkas, “A molecular dynamics study of polycrystalline fcc metals at the nanoscale: grain boundary structure and its influence on plastic deformation,” Materials Science and Engineering A, vol. 309-310, pp. 440–444, 2001.
View at: Publisher Site | Google Scholar
H. van Swygenhoven, “Grain boundaries and dislocations,” Science, vol. 296, no. 5565, pp. 66–67, 2002.
View at: Publisher Site | Google Scholar
J. Schiøtz, T. Vegge, F. D. Di Tolla, and K. W. Jacobsen, “Atomic-scale simulations of the mechanical deformation of nanocrystalline metals,” Physical Review B, vol. 60, no. 17, pp. 11971–11983, 1999.
View at: Publisher Site | Google Scholar
G. Z. Voronoi, “Nouvelles applications des paramtres continus s la thorie des. Formes quadratiques, deuxime mmoire,” Journal für die Reine und Angewandte Mathematik, vol. 134, pp. 198–287, 1908.
View at: Google Scholar
P. G. Sanders, J. A. Eastman, and J. R. Weertman, “Pore distributions in nanocrystalline metals from small-angle neutron scattering,” Acta Materialia, vol. 46, no. 12, pp. 4195–4202, 1998.
View at: Publisher Site | Google Scholar
M. W. Finnis and J. E. Sinclair, “A simple empirical $N$ -body potential for transition metals,” Philosophical Magazine A, vol. 50, no. 1, pp. 45–55, 1984.
View at: Publisher Site | Google Scholar
J. Cai, “The structural phase transformation and elastic instability in F.C.C. metals,” Physica Status Solidi B, vol. 203, no. 2, pp. 345–356, 1997.
View at: Publisher Site | Google Scholar
J. D. Honeycutt and H. C. Andersen, “Molecular dynamics study of melting and freezing of small Lennard-Jones clusters,” Journal of Physical Chemistry, vol. 91, no. 19, pp. 4950–4963, 1987.
View at: Publisher Site | Google Scholar
A. S. Clarke and H. Jónsson, “Structural changes accompanying densification of random hard-sphere packings,” Physical Review E, vol. 47, no. 6, pp. 3975–3984, 1993.
View at: Publisher Site | Google Scholar
V. Krstic, U. Erb, and G. Palumbo, “Effect of porosity on Young's modulus of nanocrystalline materials,” Scripta Metallurgica et Materialia, vol. 29, no. 11, pp. 1501–1504, 1993.
View at: Publisher Site | Google Scholar

Copyright

Copyright © 2007 Chen Zheng and Yong-Wei Zhang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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