A model of size effects in nano-indentation Academic Article

abstract

• The indentation hardness-depth relation established by Nix and Gao [1998. Indentation size effects in crystalline materials: a law for strain gradient plasticity. J. Mech. Phys. Solids 46, 411-425] agrees well with the micro-indentation but not nano-indentation hardness data. We establish an analytic model for nano-indentation hardness based on the maximum allowable density of geometrically necessary dislocations. The model gives a simple relation between indentation hardness and depth, which degenerates to Nix and Gao [1998. Indentation size effects in crystalline materials: a law for strain gradient plasticity. J. Mech. Phys. Solids 46, 411-425] for micro-indentation. The model agrees well with both micro- and nano-indentation hardness data of MgO and iridium. 2006 Elsevier Ltd. All rights reserved.

authors

• Pharr, George

published proceedings

• Journal of the Mechanics and Physics of Solids

author list (cited authors)

• Huang, Y., Zhang, F., Hwang, K. C., Nix, W. D., Pharr, G. M., & Feng, G.

citation count

• 294

complete list of authors

• Huang, Y||Zhang, F||Hwang, KC||Nix, WD||Pharr, GM||Feng, G

publication date

• August 2006

publisher

• Elsevier  Publisher

published in

• Journal of the Mechanics and Physics of Solids  Journal

Digital Object Identifier (DOI)

• 10.1016/j.jmps.2006.02.002

start page

• 1668

end page

• 1686

volume

• 54

issue

• 8

URL

• http://dx.doi.org/10.1016/j.jmps.2006.02.002