Abstract
Experiments were conducted in annealed iridium using pyramidal and spherical indenters over a wide range of load. For a Berkovich pyramidal indenter, the hardness increased with decreasing depth of penetration. However, for spherical indenters, hardness increased with decreasing sphere radius. Based on the number of geometrically necessary dislocations generated during indentation, a theory that takes into account the work hardening differences between pyramidal and spherical indenters is developed to correlate the indentation size effects measured with the two indenters. The experimental results verify the theoretical correlation.
Original language | English |
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Pages (from-to) | 451-456 |
Number of pages | 6 |
Journal | Materials Research Society Symposium Proceedings |
Volume | 695 |
DOIs | |
Publication status | Published - 2001 |
Bibliographical note
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Keywords
- annealed iridium
- pyramidal indenters
- spherical indenters
- Iridium alloys
- Indentation
- Indentation size effect