Abstract
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 language | English |
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Article number | 161922 |
Journal | Applied Physics Letters |
Volume | 88 |
Issue number | 16 |
DOIs | |
Publication status | Published - 2006 Apr 17 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)