Results 261 to 270 of about 19,950 (296)

Inference of Mechanical Properties from Instrumented Depth Sensing Indentation at Tiny Loads and Indentation Depths

Crystal Research and Technology, 2000
Different hardness measures as Vickers, Brinell and Meyer hardness are discussed with respect to their physical interpretation. Meyer hardness is found to be best suited as a measure of plastic properties. The outline of a depth sensing nanoindentation experiment is described, and particular emphasis is given to the correct deduction of the contact ...
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Indentation Depth Dependent Hardness in Polydimethylsiloxane

Volume 1: Advances in Aerospace Technology; Energy Water Nexus; Globalization of Engineering; Posters, 2011
Size dependent deformation in polymers has been observed in various experiments including microbeam bending, foams, composites and indentation. For indentation depths from 100 microns down to hundreds of nanometers strong increases in the hardness has been observed where the hardness has been determined with a Berkovich indenter tip on ...
Chung-Souk Han, Andrew J. Wrucke, Partha Majumdar   +2 more
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Correction of indentation load–depth curve based on elastic deformation of sharp indenter

Mechanics of Materials, 2014
Abstract Indenters in numerical analyses are usually assumed rigid. For rigid indenters, the ratios of Kick’s law coefficient to elastic modulus (C/E) are equal for materials with equal values of yield strain (eo) and strain hardening coefficient (n).
Minsoo Kim, Sungsik Bang, Felix Rickhey, Hyungyil Lee   +3 more
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Effect of the friction between a point-sharp indenter and an indented elastoplastic solid on the load and depth sensing indentation

Materials Today: Proceedings, 2019
Abstract The effect of the friction coefficient μ between a point-sharp indenter and an indented elastoplastic solid on nanoindentation behavior is examined quantitatively in a wide range of μ with varying the elastoplasticity of the solids through the numerical analysis of nanoindentations simulated with the finite element method.
Takashi Akatsu, Keisuke Yokota, Yutaka Shinoda, FUMIHIRO WAKAI   +3 more
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Methods of correction for analysis of depth-sensing indentation test data for spherical indenters

Journal of Materials Research, 2001
Depth-sensing indentation testing has proven extremely useful in the determination of mechanical properties of thin films and small volumes of material. However, the validity of the results obtained depend largely on the corrections made to the experimentally recorded data to account for initial penetration depth, nonuniformities in indenter shape, and
A. C. Fischer-Cripps, A. Bendeli, T. J. Bell, J. S. Field, A. K. Jamting   +4 more
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A new consideration on spherical depth sensing indentation

Materials Letters, 2008
This work evaluates the influence of the pile up or sink in phenomena onto the values of elastic modulus determined by instrumented indentation tests with spherical tips on different metallic materials. A new procedure for the determination of this property is proposed, based on the hypothesis of contact radius constancy during the unloading process ...
M.A. Garrido Maneiro, J. Rodríguez
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Lesion Depth and Microhardness Indentations on Artificial White Spot Lesions

Caries Research, 2009
In this paper the relation between the average lesion depth (1) of artificial carious lesions and the length of microhardness indentations (D) on the surface (the load perpendicular to the surface) is investigated. The results show that an empirical linear relationship does exist between 1 and D for both human and bovine enamel.
ARENDS, J, SCHUTHOF, J, JONGEBLOED, WG
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Cyclic Depth-Sensing Indentation of Gold Wire

Key Engineering Materials, 2008
Conventional depth-sending indentation and novel cyclic indentation were performed to study the mechanical properties and strengthening mechanism of pure gold and Ca-doped gold of up to 90 ppm. The system was chosen because it is popular materials for microelectronics interconnection, yet the strengthening mechanism is not well-understood. Conventional
Thirumany Sritharan, T. Saraswati, S. Mhaisalkar   +2 more
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Use of combined elastic modulus in depth-sensing indentation with a conical indenter

Journal of Materials Research, 2003
Conventional methods of analysis for depth-sensing indentation test data use the slope of the elastic unloading portion of the load–displacement response in conjunction with the elastic equations of contact for a rigid cone. It is common practice to incorporate the combined modulus of the indenter and specimen in these equations although the validity ...
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The Role of Indentation Depth on the Measured Hardness of Materials

MRS Proceedings, 1993
ABSTRACTUltra micro-indentation tests on Ni and Cu samples showed increasing hardness with decreasing penetration depth over a range from 200 to 2000 nm. The results suggest increased strain hardening with decreased indentation depth. To establish that this is a real material effect, a series of tests were conducted on amorphous materials, for which ...
Melissa Shell De Guzman, Gabi Neubauer, Paul Flinn, William D. Nix   +3 more
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