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Indentation hardness of biomorphic SiC
International Journal of Refractory Metals and Hard Materials, 2005Vickers hardness (HV) measurements have been performed in SiC samples fabricated from various wood precursors (pine, beech, and eucalyptus): bioSiC. It was found that hardness was highly dependent on starting wood structure. The arrangement of wood cells determined the final microstructure of the bioSiC (pores distribution and SiC/Si ratio).
F. Gutierrez-Mora +4 more
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Topics in indentation hardness
Metal Science, 1982Problemes recents au sujet de la mesure de durete par indentation: comparaison de corps solides par indentation mutuelle, indentation de solides de faible module d'elasticite et de grande limite elastique, anisotropie de la durete, rupture par identation, durete et restauration elasticique, effets d ...
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Indentation Hardness of Diamond
Nature, 1956RECENTLY, S. Tolansky and V. R. Howes1 published some data on indentation compression strength with a diamond ball (0.39 mm. radius) on differently orientated diamond faces. They obtained values for the pressure which caused cracking on different diamond faces ranging from 1.2 to 1.8 × 1011 dyne-cm.−2 (1,200–1,800 kgm./mm.2).
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Indentation hardness and hot pressing
Acta Metallurgica, 1980Methods are reviewed for calculating the pressure distribution over the area of contact between spheres undergoing linear deformation. The relationship P[p(r,t)] = (4/πR)Q[(a2 − r2)12], where p is the pressure over the interface. R is the sphere radius, a is the radius of the circle of contact and r is the polar co-ordinate in the interface, holds when
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Indentation hardness testing of rock
International Journal of Rock Mechanics and Mining Sciences, 1998The indentation testing was used for characterisation of hardness of rock materials. During the test, an indentor under applied load penetrated into the rock surface forming a crater. The testing procedure was developed to be in line with other ISRM Suggested Methods. The results show that standardised indentation testing allows for characterisation of
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Micro-indentation hardness studies on human bones
Cells Tissues Organs, 1979Bones from different portions of human skeleton are polished and cut to suitable sizes and then subjected to micro-indentation at various loads using Vicker’s diamond pyramidal indenter. The Vicker’s hardness number is found to differ slightly from portion to portion of the skeleton.
M, Ramrakhiani, D, Pal, T S, Murty
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Dynamic Indentation Hardness of Metals
2006An experimental technique for determining the dynamic indentation hardness of materials is described. Unlike the traditional static hardness measurements, the dynamic hardness measurements can capture the inherent rate dependent material response that is germane to high strain rate deformation processes such as high speed machining and impact.
Brian J. Koeppel, Ghatu Subhash
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Hardness Indentation Studies On Metallic Glasses
MRS Proceedings, 2002ABSTRACTVickers micro-hardness indentations have been performed on a number of amorphous metals. The effects of changes in indentation load on the hardness and appearance of indents will be discussed for amorphous Al87Ni7Gd6. In addition, the effects of changes in test temperature on the micro-hardness and appearance of indentations in Vitreloy I are ...
Paul Wesseling +2 more
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Elastic‐Plastic Indentation of Hard, Brittle Materials with Spherical Indenters
Journal of the American Ceramic Society, 1994A method was developed at the U.S. Bureau of Mines to measure the plastic deformation of hard, brittle materials with low values of elastic modulus to hardness ( E/H ). The method involves indenting the hard materials with spherical indenters and measuring the resulting contact diameter and ...
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Indentation Velocity Effect on Martens Hardness Measurement [PDF]
, 2002 The indentation velocity effect on Martens Hardness (HM) was investigated in the macro-, micro- and nano ranges of the indentation test. The indentation test in the micro- and nanorange was analyzed for practical indentation velocities ranging between 2 to 60 nm/s.
Herrmann K. +4 more
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