One-to-one spatially matched experiment and atomistic simulations of nanometre-scale indentation

D. J. Oliver, W. Paul, M. El Ouali, T. Hagedorn, Y. Miyahara, Y. Qi, P. H. Grütter

Research output: Contribution to journalArticle

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Abstract

We have carried out nanoindentation studies of gold in which the indenter is atomically characterized by field-ion microscopy and the scale of deformation is sufficiently small to be directly compared with atomistic simulations. We find that many features of the experiment are correctly reproduced by molecular dynamics simulations, in some cases only when an atomically rough indenter rather than a smooth repulsive-potential indenter is used. Heterogeneous nucleation of dislocations is found to take place at surface defect sites. Using input from atomistic simulations, a model of indentation based on stochastic transitions between continuum elastic-plastic states is developed, which accurately predicts the size distributions of plastic 'pop-in' events and their dependence on tip geometry.

LanguageEnglish (US)
Article number025701
JournalNanotechnology
Volume25
Issue number2
DOIs
StatePublished - Jan 17 2014

Profile

Indentation
Plastics
Surface defects
Nanoindentation
Gold
Molecular dynamics
Microscopic examination
Nucleation
Experiments
Ions
Geometry
Computer simulation

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Oliver, D. J., Paul, W., El Ouali, M., Hagedorn, T., Miyahara, Y., Qi, Y., & Grütter, P. H. (2014). One-to-one spatially matched experiment and atomistic simulations of nanometre-scale indentation. Nanotechnology, 25(2), [025701]. DOI: 10.1088/0957-4484/25/2/025701

One-to-one spatially matched experiment and atomistic simulations of nanometre-scale indentation. / Oliver, D. J.; Paul, W.; El Ouali, M.; Hagedorn, T.; Miyahara, Y.; Qi, Y.; Grütter, P. H.

In: Nanotechnology, Vol. 25, No. 2, 025701, 17.01.2014.

Research output: Contribution to journalArticle

Oliver, DJ, Paul, W, El Ouali, M, Hagedorn, T, Miyahara, Y, Qi, Y & Grütter, PH 2014, 'One-to-one spatially matched experiment and atomistic simulations of nanometre-scale indentation' Nanotechnology, vol 25, no. 2, 025701. DOI: 10.1088/0957-4484/25/2/025701
Oliver DJ, Paul W, El Ouali M, Hagedorn T, Miyahara Y, Qi Y et al. One-to-one spatially matched experiment and atomistic simulations of nanometre-scale indentation. Nanotechnology. 2014 Jan 17;25(2). 025701. Available from, DOI: 10.1088/0957-4484/25/2/025701
Oliver, D. J. ; Paul, W. ; El Ouali, M. ; Hagedorn, T. ; Miyahara, Y. ; Qi, Y. ; Grütter, P. H./ One-to-one spatially matched experiment and atomistic simulations of nanometre-scale indentation. In: Nanotechnology. 2014 ; Vol. 25, No. 2.
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