1998
DOI: 10.1016/s0263-4368(98)00028-6
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Hardness to toughness relationship of fine-grained WC-Co hardmetals

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Cited by 337 publications
(98 citation statements)
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“…These include the evaluation of different mechanical properties of materials including elasticity modulus (E), fracture toughness (K IC ), and the elastic-plastic power law curve 2 . However, the implementation of some of these techniques and many of their results still raise questions among researchers 3,4 . Difficulties are particularly acute when materials like tungsten carbide with cobalt (WC-Co), which present a mechanical behavior between a plain brittle ceramic and a more ductile metal, are tested 5 .…”
Section: Introductionmentioning
confidence: 99%
“…These include the evaluation of different mechanical properties of materials including elasticity modulus (E), fracture toughness (K IC ), and the elastic-plastic power law curve 2 . However, the implementation of some of these techniques and many of their results still raise questions among researchers 3,4 . Difficulties are particularly acute when materials like tungsten carbide with cobalt (WC-Co), which present a mechanical behavior between a plain brittle ceramic and a more ductile metal, are tested 5 .…”
Section: Introductionmentioning
confidence: 99%
“…Pomiary twardości metodą Vickersa przeprowadzono przy sile obciążającej 294,2 N przyłożonej w czasie 7 s na twardościomierzu FM-700 (Future-Tech). Odporność na kruche pękanie wyznaczono, stosując zależność [8] pomiędzy twardością a sumaryczną długością pęknięć powstałych w narożach odcisku przy pomiarze twardości metodą Vickersa: Na rys. 1 przedstawiono mikrofotografie SEM w kontraście BSE, na których widoczne są mikrostruktury płytek skrawają-cych wytworzonych z proszku WC-6Co o ultradrobnej wielkości cząstek.…”
Section: Metodyka Badańunclassified
“…Com base nestes resultados, estima-se que a pastilha GC 415 seja confeccionada com 6 % de cobalto (WC6Co) e a P 35 contém 12,5 % de cobalto (WC-12,5Co). Conforme a literatura, o aumento do percentual de cobalto no metal duro, diminui sua dureza aumentando sua tenacidade à fratura [5]. A Tabela 2 apresenta os dados experimentais obtidos nos ensaios de dureza realizados nas amostras das duas pastilhas.…”
Section: Figuraunclassified
“…A dureza superficial média encontrada foi de 15,70 ± 0,63 GPa para a pastilha GC 415 e de 15,09 ± 0,12 GPa para a P 35. Foi verificado que estes valores experimentais encontram-se dentro dos limites disponíveis na literatura para carbonetos de tungstênio com 5,00 -15,00% de cobalto, e da faixa descrita pelo fabricante (14,00 a 18,00 GPa) [5,10,16]. Observou-se uma uniformidade da dureza superficial para cada pastilha.…”
Section: Figuraunclassified