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: In this article, the threshold for indentation cracking was established for a range of ceramic materials, using the techniques of scanning electron microscopy and acoustic emission, by taking into account indentation plasticity, currant theories may be successfully combined to predict threshold indentation loads and crack sizes.
Abstract: The threshold for indentation cracking is established for a range of ceramic materials, using the techniques of scanning electron microscopy and acoustic emission. It is found that by taking into account indentation plasticity, currant theories may be successfully combined to predict threshold indentation loads and crack sizes. Threshold cracking is seen to relate to radial rather than median cracking.
101 citations
TL;DR: In this paper, a nanoindenting atomic force microscope (NI-AFM) was used to study the elastic and plastic deformation properties of different lamellae in a polysynthetically twinned TiAl crystal.
101 citations
TL;DR: The development of a novel specimen goniometer that allows real-time observations of the mechanical response of materials to indentation loads is detailed and particular attention given to sample geometry and other technical requirements.
Abstract: In-situ transmission electron microscopy is an established experimental technique that permits direct observation of the dynamics and mechanisms of dislocation motion and deformation behavior. In this paper, we detail the development of a novel specimen goniometer that allows real time observations of the mechanical response of materials to indentation loads. The technology of the scanning tunneling microscope is adopted to allow nanometer scale positioning of a sharp, conductive diamond tip onto the edge of an electron transparent sample. This allows application of loads to nanometer-scale material volumes couple with simultaneous imaging of the material response. The emphasis in this paper is experimental and descriptive, with particular attention given to sample geometry and other technical requirements. Examples of the deformation of aluminum and titanium carbide as well as the fracture of silicon will be presented.
101 citations
TL;DR: In this paper, a reverse analysis of the Vickers indenter is proposed to determine the plastic properties of the indenter using a numerical simulation, which is based on the results of the experimental hardness tests acquired with single indenter geometry.
100 citations
TL;DR: A review of indenter materials for usage at high temperatures is instructive for identifying appropriate indenter-sample materials combinations to prevent indenter loss or failure due to chemical reactions or wear during indentation.
Abstract: As nanoindentation at high temperatures becomes increasingly popular, a review of indenter materials for usage at high temperatures is instructive for identifying appropriate indenter-sample materials combinations to prevent indenter loss or failure due to chemical reactions or wear during indentation. This is an important consideration for nanoindentation as extremely small volumes of reacted indenter material will have a significant effect on measurements. The high temperature hardness, elastic modulus, thermal properties, and chemical reactivities of diamond, boron carbide, silicon carbide, tungsten carbide, cubic boron nitride, and sapphire are discussed. Diamond and boron carbide show the best elevated temperature hardness, while tungsten carbide demonstrates the lowest chemical reactivity with the widest array of elements.
100 citations