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Crystals 2017, 7(1), 21; doi:10.3390/cryst7010021

Crystal Indentation Hardness

1
Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA
2
Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, UK
3
Department of Engineering, Loyola University Maryland, Baltimore, MD 21210, USA
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Sławomir Grabowski
Received: 5 January 2017 / Accepted: 6 January 2017 / Published: 12 January 2017
(This article belongs to the Special Issue Crystal Indentation Hardness)
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Abstract

There is expanded interest in the long-standing subject of the hardness properties of materials. A major part of such interest is due to the advent of nanoindentation hardness testing systems which have made available orders of magnitude increases in load and displacement measuring capabilities achieved in a continuously recorded test procedure. The new results have been smoothly merged with other advances in conventional hardness testing and with parallel developments in improved model descriptions of both elastic contact mechanics and dislocation mechanisms operative in the understanding of crystal plasticity and fracturing behaviors. No crystal is either too soft or too hard to prevent the determination of its elastic, plastic and cracking properties under a suitable probing indenter. A sampling of the wealth of measurements and reported analyses associated with the topic on a wide variety of materials are presented in the current Special Issue. View Full-Text
Keywords: crystal hardness; nanoindentations; dislocations; contact mechanics; indentation plasticity; plastic anisotropy; stress–strain characterizations; indentation fracture mechanics crystal hardness; nanoindentations; dislocations; contact mechanics; indentation plasticity; plastic anisotropy; stress–strain characterizations; indentation fracture mechanics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Armstrong, R.W.; Walley, S.M.; Elban, W.L. Crystal Indentation Hardness. Crystals 2017, 7, 21.

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