Strengthening and softening of nanocrystalline nickel during multistep nanoindentation

D. Pan, T. G. Nieh, M. W. Chen

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    63 Citations (Scopus)


    Multistep load-unload nanoindentation was employed to address the effect of deformation-induced microstructural evolution on mechanical behavior of nanocrystalline Ni. Deformation discontinuity was deliberately introduced by unloading-reloading during nanoindentation testing, which allows us to examine the influence of microstructural evolution on the successive deformation. Strain strengthening/softening of nanocrystalline nickel, associated with the transition of deformation behavior from dislocation activity at high loading rates to a grain-boundary-mediated process at low loading rates, was uncovered by means of this experimental methodology.

    Original languageEnglish
    Article number161922
    JournalApplied Physics Letters
    Issue number16
    Publication statusPublished - 2006 Apr 17

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)


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