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: Research - peer-reviewArticle

    • 11 Citations

    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
    Experiments
    Surface defects
    Nanoindentation
    Gold
    Molecular dynamics
    Microscopic examination
    Nucleation
    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: Research - peer-reviewArticle

    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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