Journal ArticleDOI
Indentation microfracture in the Palmqvist crack regime: implications for fracture toughness evaluation by the indentation method
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This article is published in Journal of Materials Science Letters.The article was published on 1982-11-01. It has received 211 citations till now. The article focuses on the topics: Indentation & Fracture toughness.read more
Citations
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Direct Observation and Analysis of Indentation Cracking in Glasses and Ceramics
Robert F. Cook,George M. Pharr +1 more
TL;DR: In this paper, the authors investigated the material dependence of the initiation sequence of indentation cracks (cone, radial, median, half-penny, and lateral) using an inverted tester allowing simultaneous viewing of the fracture process and measurement of the indeter load and displacement during contact.
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Indentation fracture of WC-Co cermets
TL;DR: In this paper, a series of well-characterized WC-Co cermets were studied with a Vickers diamond pyramid indenter and the resulting crack length-indentation load data were analyzed in terms of relations characteristic of radial (Palmqvist) and fully developed radial/median (half-penny) crack geometries.
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Vickers indentation fracture toughness test Part 2 Application and critical evaluation of standardised indentation toughness equations
Clive B. Ponton,R. D. Rawlings +1 more
TL;DR: The standardised indentation fracture toughness equations formulated in Part 1 have been applied to a range of brittle materials: namely, glass ceramics, aluminas, zirconias, and WC-Co cermets.
Journal ArticleDOI
Indentation Fracture Toughness of Sintered Silicon Carbide in the Palmqvist Crack Regime
TL;DR: In this paper, the fracture toughness of a sintered dense alpha-SiC was estimated by the Vickers indentation microfracture method in the low-load Palmqvist crack regime.
Journal ArticleDOI
Evaluation by indentation of fracture toughness of ceramic materials
TL;DR: In this paper, a new expression to determine the fracture toughness (KIC) by indentation is presented, which is independent of the crack profile (median or Palmqvist) and of the applied load.
References
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Journal ArticleDOI
Fracture Toughness Determinations by Indentation
Anthony G. Evans,E. A. Charles +1 more
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Evaluation ofKIc of brittle solids by the indentation method with low crack-to-indent ratios
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The crack-initiation threshold in ceramic materials subject to elastic/plastic indentation
James Lankford,David L. Davidson +1 more
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.
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Threshold microfracture during elastic-plastic indentation of ceramics
TL;DR: In this paper, it was shown that for a variety of ceramics, the threshold for microfracture during elastic-plastic indentation corresponds to radial, rather than subsurface median, crack formation.
Compressive Strength and Damage Mechanisms in Ceramic Materials. I. Temperature-Strain Rate Dependence of Compressive Strength and Damage Mechanism in Aluminum Oxide. II. Threshold Microfracture during Elastic-Plastic Indentation of Ceramics.
TL;DR: In this paper, the results of compression tests of Al2O3 performed over a wide range in temperature and strain rate are interpreted in terms of dominant damage mechanisms, such as tensile (Mode I) growth of predominantly axial microcracks, and each characteristic of a specific temperature-strain rate regime.