Yield strength asymmetry in metal nanowires

Journal Article (Journal Article)

We performed atomistic simulations to study the yield mechanisms in gold nanowires. Perfect fee gold nanowires all yield via the nucleation and propagation of {111}〈112〉 partial dislocations. The magnitude of the yield stress is much larger in tension versus compression for very small 〈100〉 nanowires, and this asymmetry is primarily due to the effects of surface stresses and different slip systems active during tensile and compressive yielding. Nanowires with a 〈111〉 orientation only show significant tension-compression asymmetry when defects exist in the wire prior to reverse compressive loading. The predictions may explain recent measurements regarding the yield of gold nanowires (see Marszalek, P. E.; Greenleaf, W. J.; Li, H. B.; Oberhauser, A. F.; Fernandez, J. M. PNAS 2000, 97, 6282).

Full Text

Duke Authors

Cited Authors

  • Diao, J; Gall, K; Dunn, ML

Published Date

  • October 1, 2004

Published In

Volume / Issue

  • 4 / 10

Start / End Page

  • 1863 - 1867

International Standard Serial Number (ISSN)

  • 1530-6984

Digital Object Identifier (DOI)

  • 10.1021/nl0489992

Citation Source

  • Scopus