Dislocation Emission around Nanoindentations on a (001) fcc Metal Surface Studied by STM and Atomistic Simulations

O. Rodriguez de la Fuente; J. A. Zimmerman; M. A. Gonzalez; J. de la Figuera; J. C. Hamilton; Woei Wu Pai; J. M. Rojo

doi:10.1103/PhysRevLett.88.036101

Dislocation Emission around Nanoindentations on a (001) fcc Metal Surface Studied by STM and Atomistic Simulations

Materials Science 2009-11-07 v1

Authors: O. Rodriguez de la Fuente , J. A. Zimmerman , M. A. Gonzalez , J. de la Figuera , J. C. Hamilton , Woei Wu Pai , J. M. Rojo

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Abstract

We present a combined study by Scanning Tunneling Microscopy and atomistic simulations of the emission of dissociated dislocation loops by nanoindentation on a (001) fcc surface. The latter consist of two stacking-fault ribbons bounded by Shockley partials and a stair-rod dislocation. These dissociated loops, which intersect the surface, are shown to originate from loops of interstitial character emitted along the <110> directions and are usually located at hundreds of angstroms away from the indentation point. Simulations reproduce the nucleation and glide of these dislocation loops.

Keywords

dislocation nanoindentation STM atomistic simulation stacking fault

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@article{arxiv.cond-mat/0201557,
  title  = {Dislocation Emission around Nanoindentations on a (001) fcc Metal Surface Studied by STM and Atomistic Simulations},
  author = {O. Rodriguez de la Fuente and J. A. Zimmerman and M. A. Gonzalez and J. de la Figuera and J. C. Hamilton and Woei Wu Pai and J. M. Rojo},
  journal= {arXiv preprint arXiv:cond-mat/0201557},
  year   = {2009}
}

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10 pages, 4 figures

Dislocation Emission around Nanoindentations on a (001) fcc Metal Surface Studied by STM and Atomistic Simulations

Abstract

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