A pentagonal indenter for hardness measurements
- 1 June 1975
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 8 (6) , 456-460
- https://doi.org/10.1088/0022-3735/8/6/010
Abstract
A new indenter has been designed to eliminate the anisotropy normally observed in hardness measurements on single crystals when the Vickers, Berkovich and Knoop indenters are used. It has the form of a regular pentagon based pyramid with an angle of 65 degrees between each facet face and its geometric axis. Preliminary measurements show that this indenter gives reproducible results on crystalline materials of widely differing hardness from lead (0.05 GN m-2) to diamond ( approximately 100 GN m-2), which are directly comparable with those of the conventional pyramidal indenters. Moreover, these results are independent of the orientation between indenter facets and the crystallographic characteristics of the indented surface.Keywords
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