Topic
Indentation
About: Indentation is a research topic. Over the lifetime, 13002 publications have been published within this topic receiving 340476 citations.
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TL;DR: A recently proposed technique combines the traditional indentation test with the mapping of residual deformations (imprint), thus providing experimental data which are used to identify isotropic and anisotropic material parameters in more accurate fashion and in larger number.
73 citations
TL;DR: In this article, both ball (Brinell) and flat punch (Boussinesq) indentation is analyzed theoretically and simple but rigorous formulae for a complete characterization of linear materials are presented.
73 citations
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TL;DR: In this article, the authors compare the predictions obtained using different models and to understand why it is often reported that the Jonsson and Hogmark model does not hold for indentation prints less than the coating thickness.
Abstract: The extensive use of appropriate coatings to improve wear resistance, friction coefficient, electrical properties and protection from corrosion has stimulated a growing interest in their mechanical properties, and especially hardness measurements. The objects of this study are to compare the predictions obtained using different models and to understand why it is often reported that the Jonsson and Hogmark model does not hold for indentation prints less than the coating thickness. Methods were reviewed for calculating the composite hardness, and it was found that the simplifications made by the authors are not always valid. By taking in account all the terms of the equations of Jonsson and Hogmark, it was found that the relation between the hardness and the reciprocal length of the indentation print is not linear and depends on the ratio between the film thickness and the indentation print, as well as the variation of the hardness of the substrate and the film with the applied load. Comparison of the Burnett and Rickerby experimental data with the modified model led to very good agreement.
73 citations
TL;DR: In this paper, a series of orthogonal cracks generated at loads not exceeding 10 mN with the cube-corner indenter was observed and a variation of crack length with position around a large Vickers impression in soda-lime glass was observed.
Abstract: The lowered threshold load for cracking with the cube-corner indenter has been used in developing a method that can be used to measure residual stresses in small volume brittle materials. By studying a series of orthogonal cracks generated at loads not exceeding 10 mN with the cube-corner indenter, a variation of crack length with position around a large Vickers impression in soda–lime glass was observed. Using an indentation fracture mechanics approach residual stresses were evaluated at the positions where the cube-corner indents had been made. The stress values thus evaluated were generally higher than those reported in the literature where micro-Vickers indents had been used to measure the stresses. Possible reasons for the disparity are discussed.
73 citations
TL;DR: In this paper, a micromechanical-based model for temperature and rate Indentation Size Effects (TRISE) for body centered cubic (BCC) metals encountered in nanoindentation experiments is proposed.
73 citations