Volumes sampled for hardness and for modulus of elasticity during nanoindentation testing

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dc.contributor.author Kashani, Mahdi Saket
dc.contributor.author Gilvan, Akbar Aftabi
dc.contributor.author Madhavan, Viswanathan
dc.date.accessioned 2012-06-29T14:54:01Z
dc.date.available 2012-06-29T14:54:01Z
dc.date.issued 2012-06-28
dc.identifier.citation Mahdi Saket Kashani, Akbar Aftabi Gilvan and Vis Madhavan (2012). Volumes sampled for hardness and for modulus of elasticity during nanoindentation testing. Journal of Materials Research, 27 , pp 1553-1564 doi:10.1557/jmr.2012.107 en_US
dc.identifier.issn 0884-2914
dc.identifier.other WOS: 000304916800002
dc.identifier.uri http://hdl.handle.net/10057/5236
dc.identifier.uri http://dx.doi.org/10.1557/jmr.2012.107
dc.description Click on the DOI link below to access the article (may not be free). en_US
dc.description.abstract In this article, the sizes of the volumes sampled by nanoindentation tests for hardness and modulus measurements are studied using finite element simulations. The zones of influence for hardness and modulus in single-phase systems are determined by modeling a hemispherical particle in a matrix, with properties close to those of each other, and monitoring the deviation of the measured values from those of the particle. It is found that, for hardness testing of elastic-perfectly plastic materials, the intrinsic hardness of the particle is measured as long as the plastic region is still within the particle, i.e., the contact radius is one half or less of the particle radius. Thus, in a hardness test of a single-phase material, all of the plastically deforming material, and only the plastically deforming material, contributes to the hardness measured. In contrast, the zone influencing the modulus is not restricted to a specific volume near the indenter. The modulus measured from the elastic response at the indentation point is dependent upon the entire specimen. A relationship is developed to describe the observed behavior of the measured modulus, that holds true for both sink-in and pile-up material behavior and for different indenter cone angles. en_US
dc.language.iso en_US en_US
dc.publisher Cambridge University Press en_US
dc.relation.ispartofseries Journal of Materials Research;2012, V.27, No.12
dc.subject Nanoindentation en_US
dc.subject Hardness en_US
dc.subject Elastic properties en_US
dc.subject.classification MATERIAL SCIENCE
dc.title Volumes sampled for hardness and for modulus of elasticity during nanoindentation testing en_US
dc.type Article en_US
dc.description.version Peer reviewed
dc.rights.holder Copyright © Materials Research Society 2012

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