The correlation of indentation size effect experiments with pyramidal and spherical indenters.

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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.

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6 p.

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Swadener, J. G. (John G.); George, Easo P. & Pharr, G.M. January 1, 2001.

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Description

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.

Physical Description

6 p.

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  • Submitted to: 2001 MRS Fall Meeting/Materials Research Society, November 26-30, 2001, Boston, MA

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  • Report No.: LA-UR-01-6528
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975885
  • Archival Resource Key: ark:/67531/metadc928031

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 2001

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 5:46 p.m.

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Swadener, J. G. (John G.); George, Easo P. & Pharr, G.M. The correlation of indentation size effect experiments with pyramidal and spherical indenters., article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc928031/: accessed July 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.