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Selected Works of Duane D. Johnson
Article
Generalized planar fault energies and twinning in Cu–Al alloys
Applied Physics Letters (2006)
  • S. Kibey, University of Illinois at Urbana-Champaign
  • J. B. Liu, University of Illinois at Urbana-Champaign
  • Duane D. Johnson, University of Illinois at Urbana-Champaign
  • H. Sehitoglu, University of Illinois at Urbana-Champaign
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Abstract
We report ab initio density functional theory calculations of generalized planar fault energies of fcc Cu–xAl (x=0, 5.0, and 8.3at.%) alloys. We investigate the effects of substitutional solute Al on the unstable intrinsic γus and twin γutstacking faultenergies (SFEs). Our results reveal an increased tendency of Cu–Al to deform preferentially by twinning with increasing Al content, consistent with experiment. We attribute this mechanical behavior to appreciable lowering of the twinning barrier γut, along with the stable intrinsic and twin SFEs.
Keywords
  • Aluminum,
  • Copper,
  • Stacking faults,
  • Nucleation,
  • Crystalling alloys
Disciplines
Publication Date
2006
Publisher Statement
The following article appeared in Appl. Phys. Lett. 89, 191911 (2006) and may be found at http://dx.doi.org/10.1063/1.2387133. Copyright 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Citation Information
S. Kibey, J. B. Liu, Duane D. Johnson and H. Sehitoglu. "Generalized planar fault energies and twinning in Cu–Al alloys" Applied Physics Letters Vol. 89 Iss. 19 (2006)
Available at: http://works.bepress.com/duane_johnson/87/