Strengthening and softening of nanocrystalline nickel during multistep nanoindentation

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

doi:10.1063/1.2197289

Strengthening and softening of nanocrystalline nickel during multistep nanoindentation

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

Research output: Contribution to journal › Article › peer-review

62 Citations (Scopus)

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
Article number	161922
Journal	Applied Physics Letters
Volume	88
Issue number	16
DOIs	https://doi.org/10.1063/1.2197289
Publication status	Published - 2006 Apr 17

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2197289

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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.",

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note = "Funding Information: This work was sponsored by Grant-in-Aid, Japan Society for Promotion of Science (JSPS) and partly supported by Division of Materials Science and Engineering, Office of Basic Energy Sciences, U.S. Department of Energy under Contract No. DE-AC05-00OR-22725 with UT-Battelle. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

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