On the Size Effect in Hardness by Nanoindentation Method
A model describing nanoindentation as plastic deformation resulting from a strain gradient is investigated. Using a simplified axisymmetric nanoindentation, the effective strain gradient for indentation depth is derived. The proposed indentation model is a modification of Nix and Gao’s model (1998) . To validate this approach for nanoindentation, solutions for depth-dependent hardness of single various materials such as Cu, Al, Ni are compared with experiments. Results show that the proposed model agrees well with the hardness experiments.
Ichsan Setya Putra and Djoko Suharto
H. K. Lee et al., "On the Size Effect in Hardness by Nanoindentation Method", Key Engineering Materials, Vols. 306-308, pp. 911-916, 2006