Vickers indentation fracture toughness test Part 1 Review of literature and formulation of standardised indentation toughness equations

Ponton, C. B.; Rawlings, R. D.

doi:10.1179/026708389790222852

Cited by 151 publications

(163 citation statements)

References 20 publications

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“…The crack length was measured as a function of the applied load [37,38]. The method of successive surface polishing is used to confirm that the cracking is Palmqvist-type cracking, i.e., the beginning of the crack deviates from the edge of the footprint as clarified by the polishing steps.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Development of nickel–phosphorus coatings containing micro particles of talc phyllosilicates

Alexis

Gaussens

Etcheverry

et al. 2013

Materials Chemistry and Physics

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Section: Mechanical Propertiesmentioning

confidence: 99%

Development of nickel–phosphorus coatings containing micro particles of talc phyllosilicates

Alexis

Gaussens

Etcheverry

et al. 2013

Materials Chemistry and Physics

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“…Vickers hardness was measured under a 9.8 N load held for 15 s, and fracture toughness was estimated by the indentation method using Evans and Davis's equation. 13) Figure 1 shows typical X-ray diffraction (XRD) analysis results of the sintered bodies. Figure 2 shows the relative intensity of the sintered bodies, calculated from the intensities of the highest diffraction peaks for W 2 B (211), WB (112), and WC (100), as a function of the WC mole fraction in the starting powder mixtures, given by x/(6 + x).…”

Section: Methodsmentioning

confidence: 99%

“…The fracture toughness was obtained from the results of the Vickers indentation test using Evans and Davis's equation, 13) which is recommended as being valid for brittle materials, especially WC-Co hard metals. 21) Figure 9 shows the fracture toughness as a function of the WC mole fraction.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Preparation of WC-WB-W<SUB>2</SUB>B Composites from B<SUB>4</SUB>C-W-WC Powders and their Mechanical Properties

Sugiyama

Taimatsu

2002

Mater. Trans.

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Sintered composites of WC-WB-W 2 B were prepared from B 4 C-W-WC powders using a reactive energization hot-pressing technique that initiated a solid state reaction between B 4 C and W. Below a WC mole fraction of 0.769 in the starting powder, WB and WC were formed according to the reaction B 4 C + 5W + xWC = WB + (1 + x)WC, while WB, W 2 B, and WC were produced above a mole fraction of 0.854. Densely sintered bodies were not obtained for pure WC. Composites of WC-WB-W 2 B obtained at WC mole fractions between 0.854 and 0.956 were fully consolidated, having high Young's modulus and Vickers hardness values, and a fracture toughness which were comparable to those of WC.

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“…Ponton et Rawlings [19,20] ont recensé les différents modèles existantà l'époque en fonction du type de fissures : Palmqvist (P), half-penny ou Médiane (M) (Fig. 3).…”

Section: Introductionunclassified

Étude comparative par indentation des caractéristiques mécaniques de verres sodo-calcique et vitrocéramique rodés et polis par des grains abrasifs liés

Bentoumi¹,

Bouzid²,

Iost

2015

Matériaux & Techniques

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Mots clés : Verre / polissage / indentation / ténacitéAbstract -Comparative study by indentation test of the mechanical characteristics of sodalime and ceramic glasses ground and polished by bound abrasive grains. In this work, indentation toughness of 4 optical glasses (Crown K5, Heavy flint, Float glass and Zerodur r ) was analyzed regarding its surface quality. Despite the large number of the involved technological parameters, polishing of brittle materials by abrasive bonded grains shows a high efficiency and a better surface quality compared to polishing by free abrasive grains. This method has allowed obtaining roughness parameters, Ra and Rq, about 30-40 nm. Instrumented indentation tests were performed by varying the load from 5 to 300 N. A good reproducibility was achieved. Pop-in in glass ceramic was observed from 50 N, whereas it only appears from 100 N on heavy flint and float glasses and they are not highlighted on crown glass. Indentation toughness was calculated by means of the cracks length using different relationships based on hypotheses concerning the cracks geometry. Anstis, Tanaka, Niihara and Laugier equations were employed. Finally, the results obtained from these equations and their dispersions are compared.

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Vickers indentation fracture toughness test Part 1 Review of literature and formulation of standardised indentation toughness equations

Cited by 151 publications

References 20 publications

Development of nickel–phosphorus coatings containing micro particles of talc phyllosilicates

Development of nickel–phosphorus coatings containing micro particles of talc phyllosilicates

Preparation of WC-WB-W<SUB>2</SUB>B Composites from B<SUB>4</SUB>C-W-WC Powders and their Mechanical Properties

Étude comparative par indentation des caractéristiques mécaniques de verres sodo-calcique et vitrocéramique rodés et polis par des grains abrasifs liés

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