Journal ArticleDOI
Correlation between nanoindentation and tensile properties influence of the indentation size effect
R Rodriguez,I. Gutiérrez +1 more
TLDR
The nanoindentation test has become one of the most broadly expanded techniques used to measure the mechanical properties in a sub-micron range as mentioned in this paper, however, the interpretation of the data is very difficult due to the Indentation Size Effect (ISE), defined as an increase of the nanohardness by decreasing the indentation depth.Abstract:
The nanoindentation test has become one of the most broadly expanded techniques used to measure the mechanical properties in a sub-micron range. However, the interpretation of the data is very difficult due to the Indentation Size Effect (ISE). The ISE can be defined as an increase of the nanohardness by decreasing the indentation depth of the test. In the present work, the ISE of different metals has been studied by performing nanoindentation tests at different imposed depths. Furthermore, tensile tests of these materials have been carried out in order to determine empirical relations between the nanoindentation test results and the tensile properties.read more
Citations
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Journal ArticleDOI
The Indentation Size Effect: A Critical Examination of Experimental Observations and Mechanistic Interpretations
TL;DR: In this article, the authors review experimental observations of the size effect on the behavior of crystalline metals and examine prevailing ideas on the mechanisms responsible for the effect in light of recent experimental observations and computer simulations.
Journal ArticleDOI
Indentation size effect in metallic materials: Modeling strength from pop-in to macroscopic hardness using geometrically necessary dislocations
TL;DR: In this paper, the authors modeled the indentation size effect observed during indentation testing of crystalline materials in terms of geometrically necessary dislocations using a corrected Nix/Gao model.
Journal ArticleDOI
Fundamental aspects and recent progress on wear/scratch damage in polymer nanocomposites
TL;DR: In this paper, a review of the wear and scratch properties of polymer nanocomposites is presented, focusing on their wear (in dry sliding and unlubricated conditions) and scratch damage, showing that it is not valid to assume that nano-fillers always improve wear/scratch (and friction) properties.
Journal ArticleDOI
Comparison of nano-indentation hardness to microhardness
TL;DR: In this article, the authors measured the nano-indentation hardness and micro-hardness in a wide load range (0.1-19600 mN) for five materials.
Journal ArticleDOI
A multi-scale model for contact between rough surfaces
TL;DR: In this article, a non-statistical multi-scale model of the normal contact between rough surfaces is proposed, which incorporates the effect of asperity deformations at multiple scales into a simple framework for modeling the contact between nominally flat rough surfaces.
References
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Journal ArticleDOI
Indentation size effects in crystalline materials: A law for strain gradient plasticity
William D. Nix,Huajian Gao +1 more
TL;DR: In this article, the indentation size effect for crystalline materials can be accurately modeled using the concept of geometrically necessary dislocations, which leads to the following characteristic form for the depth dependence of the hardness: H H 0 1+ h ∗ h where H is the hardness for a given depth of indentation, h, H 0 is a characteristic length that depends on the shape of the indenter, the shear modulus and H 0.
Journal ArticleDOI
The deformation of plastically non-homogeneous materials
TL;DR: The geometrically necessary dislocations as discussed by the authors were introduced to distinguish them from the statistically storages in pure crystals during straining and are responsible for the normal 3-stage hardening.
Journal ArticleDOI
Determination of indenter tip geometry and indentation contact area for depth-sensing indentation experiments
TL;DR: In this paper, a new method of indenter tip shape calibration has been developed; it is based on measurements of contact compliance as well as direct SEM observations and measurements of the areas of large indentations.
Journal ArticleDOI
Measuring the elastic properties of anisotropic materials by means of indentation experiments
Joost J. Vlassak,William D. Nix +1 more
TL;DR: In this article, the authors show how the indentation modulus can be calculated for arbitrary anisotropic solids and give results for solids with cubic crystal symmetry for a flat triangular punch on a half space.
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