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Mechanical Characterization of Stick Insect Tarsal Attachment Fluid Using Atomic Force Microscopy (AFM). [PDF]
Biomimetics (Basel)Becker M +3 more
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Indentation size effect when measuring Vickers hardness
Bulletin of Kharkov National Automobile and Highway University, 2022Problem. An important aspect in the study of hardness using the Vickers pyramid is to take into account the indentation size effect. When measuring the hardness by the Vickers method, the applied load is divided by the surface area of the impression. A significant factor influencing the conformity of the hardness measurement results is the indentation ...
Vasyl Ivanovich Moshchenok +1 more
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Indentation size effect in spherical and pyramidal indentations
Journal of Physics D: Applied Physics, 2008The indentation size effect (ISE) is studied for spherical and pyramidal indentations on a Ni poly-crystal. The indentation experiments were conducted using a Berkovich geometry as well as different spherical indenters with radii of 0.38, 3.8 and 51.0??m.
Karsten Durst +2 more
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Indentation size effect in MgO
Scripta Materialia, 2004Abstract The indentation size effect (ISE) model of Nix and Gao overestimates the hardness of MgO for small indentations. The cause may be associated with a slight expansion of the plastic zone. If the plastic zone has an effective radius fa, experimental data indicate that f increases for small indentations and is 1.66 at zero indentation depth.
Feng, Gang., Nix, William.
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Interpretations of Indentation Size Effects
Journal of Applied Mechanics, 2002For very shallow indentations in W, Al, Au, and Fe-3wt%Si single crystals, hardness decreased with increasing depth irrespective of increasing or decreasing strain gradients. As such, strain gradient theory appears insufficient to explain the indentation size effect (ISE) at depths less than several hundred nanometers. Present research links the ISE to
W. W. Gerberich +4 more
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Indentation size effect in nanohardness
Acta Materialia, 2011Abstract It was shown experimentally that changing the indenter load P and the indentation size does not change the total deformation during indentation ( e t ≈ const.), and that fracture does not influence the scale effect. For this reason the physical nature of the scale effect is revealed better by nanoindentation and under more “clean ...
Yu.V. Milman, А.А. Golubenko, S.N. Dub
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Indentation size effect in nanoporous gold
Acta Materialia, 2017Abstract We find that hardness of nanoporous gold (np-Au) measured by nanoindentation tends to increase with decreasing indentation depth, similar to the indentation size effect (ISE) in solid materials. While ISE in solid materials is attributed to a local increase in density of geometrically necessary dislocations (GNDs), the origin of ISE in np-Au
Kim, Young-Cheon +5 more
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Indentation size effect: reality or artefact?
Journal of Materials Science, 1996The purpose of this investigation was to study the load dependence of the microhardness, typically in the range 5–500 gf. This well known phenomena is called the indentation size effect (ISE) and was investigated for two sets of specimens: titanium and aluminium alloys.
A. Iost, R. Bigot
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Effect of the indenter size on the indentation of aluminum
Materials Characterization, 2006Abstract The indentation behavior of annealed Al was examined using spherical indenters of different radii (0.01, 0.05, 0.1, 0.2 and 0.5 mm). The indentation stress–strain curves displayed similar strain-hardening behavior regardless of the size of indenter, while the altitude increased with the decrease of the size of indenter.
Fuqian Yang +2 more
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