Evaluation of the Nanohardness of Materials by Using a Spheroconical Indenter

摘要

We develop geometric and mathematical models of the Berkovich pyramid capable of the correct evaluation of hardness within the nanorange depending on the degree of wear of the vertex. It is shown that, by using a spheroconical indenter, one can determine, with high reliability, the character of changes in the surface and bulk hardnesses depending on the load in the course of indentation of the standard measures of hardness. The direct and reverse size effects are experimentally detected for the analyzed measurement data.