Vickers indentation fracture toughness test Part 2 Application and critical evaluation of standardised indentation toughness equations

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

doi:10.1179/026708389790339574

Cited by 70 publications

(74 citation statements)

References 34 publications

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“…The fracture toughness was estimated using the indentation method with Evans and Davis's equation, 15) which evaluates adequate values for WC-Co cemented carbides and many kinds of ceramics. 16) …”

Section: Methodsmentioning

confidence: 99%

Synthesis of W2C by Reactive Hot Pressing and Its Mechanical Properties

Taimatsu

Sugiyama²,

Kodaira

2008

Mater. Trans.

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Tungsten hemicarbide W 2 C with no or small amounts of W or WC was prepared by reaction-sintering from W and WC powders using a resistance-heated hot-pressing technique called spark plasma sintering. The product phases, density, microstructure, elastic moduli, hardness, and fracture toughness of the sintered bodies were determined. The stable region of the W 2 C phase had a narrow carbon content below 1860 C. W 2 C had a Poisson's ratio of 0.286, and its Young's modulus at zero porosity was determined to be 444 GPa from the true density and bulk density dependence. These values suggest that W 2 C has elastic deformation behavior similar to that of W.

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Section: Methodsmentioning

confidence: 99%

Synthesis of W2C by Reactive Hot Pressing and Its Mechanical Properties

Taimatsu

Sugiyama²,

Kodaira

2008

Mater. Trans.

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“…5 To locate the right side tip of the crack with the same accuracy, the procedure 1 to 4 was conducted as well. 6 The length of the crack was measured from the shift of the sample stage. In this study, the type of cracks was hypothesized as Palmqvist one as described bellow, and the fracture toughness, K IC , was calculated with the Niihara's equation 8 as follows:…”

Section: Methodsmentioning

confidence: 99%

Influence of the Measuring Method for Crack Length on the Fracture Toughness of Silicon Nitride Ceramics Obtained by the Indentation Fracture Technique

広行

秀樹

喜代司

et al. 2006

J. Ceram. Soc. Japan

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“…21) Figure 9 shows the fracture toughness as a function of the WC mole fraction. The fracture toughness increased with the WC mole fraction and had a value of 5.7 MPa m 1/2 at a mole fraction of 0.930; Young's modulus and hardness were both maximal at this value.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Preparation of WC-WB-W2B Composites from B4C-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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Vickers indentation fracture toughness test Part 2 Application and critical evaluation of standardised indentation toughness equations

Cited by 70 publications

References 34 publications

Synthesis of W<SUB>2</SUB>C by Reactive Hot Pressing and Its Mechanical Properties

Synthesis of W<SUB>2</SUB>C by Reactive Hot Pressing and Its Mechanical Properties

Influence of the Measuring Method for Crack Length on the Fracture Toughness of Silicon Nitride Ceramics Obtained by the Indentation Fracture Technique

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

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