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dc.contributor.authorTarragó Cifre, Jose María
dc.contributor.authorJiménez Piqué, Emilio
dc.contributor.authorSchneider, Ludwig
dc.contributor.authorCasellas Padró, Daniel
dc.contributor.authorTorres, Y.
dc.contributor.authorLlanes Pitarch, Luis Miguel
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.date.accessioned2016-01-29T11:47:26Z
dc.date.available2017-10-03T00:30:27Z
dc.date.issued2015-10-01
dc.identifier.citationTarrago, J., Jimenez-Pique, E., Schneider, L., Casellas, D., Torres, Y., Llanes, L. FIB/FESEM experimental and analytical assessment of R-curve behavior of WC-Co cemented carbides. "Materials science and engineering A. Structural materials properties microstructure and processing", 01 Octubre 2015, vol. 645, p. 142-149.
dc.identifier.issn0921-5093
dc.identifier.urihttp://hdl.handle.net/2117/82266
dc.description.abstractExceptional fracture toughness levels exhibited by WC-Co cemented carbides (hardmetals) are due mainly to toughening derived from plastic stretching of crack-bridging ductile enclaves. This takes place due to the development of a multiligament zone at the wake of cracks growing in a stable manner. As a result, hardmetals exhibit crack growth resistance (R-curve) behavior. In this work, the toughening mechanics and mechanisms of these materials are investigated by combining experimental and analytical approaches. Focused Ion Beam technique (FIB) and Field-Emission Scanning Electron Microscopy (FESEM) are implemented to obtain serial sectioning and imaging of crack-microstructure interaction in cracks arrested after stable extension under monotonic loading. The micrographs obtained provide experimental proof of the developing multiligament zone, including failure micromechanisms within individual bridging ligaments. Analytical assessment of the multiligament zone is then conducted on the basis of experimental information attained from FIB/FESEM images, and a model for the description of R-curve behavior of hardmetals is proposed. It was found that, due to the large stresses supported by the highly constrained and strongly bonded bridging ligaments, WC-Co cemented carbides exhibit quite steep but short R-curve behavior. Relevant strength and reliability attributes exhibited by hardmetals may then be rationalized on the basis of such toughening scenario. (C) 2015 Elsevier B.V. All rights reserved.
dc.format.extent8 p.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshTungsten carbide-colbalt alloys
dc.subject.otherA. micromechanics
dc.subject.otherFIB/FESEM
dc.subject.otherR-curve B. Cemented carbides D. Fracture
dc.subject.otherToughness
dc.subject.otherfracture-toughness evaluation
dc.subject.othercrack-growth-resistance
dc.subject.otherductile-phase
dc.subject.othertoughening mechanisms
dc.subject.otherresidual strength
dc.subject.otherbrittle materials
dc.subject.othersilicon-nitride
dc.subject.otherdeformation
dc.subject.othercomposites
dc.subject.otherhardmetals
dc.titleFIB/FESEM experimental and analytical assessment of R-curve behavior of WC-Co cemented carbides
dc.typeArticle
dc.subject.lemacCarburs
dc.subject.lemacAliatges de carbur de tungstè i cobalt -- Propietats mecàniques
dc.subject.lemacMetalls
dc.contributor.groupUniversitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials
dc.identifier.doi10.1016/j.msea.2015.07.090
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0921509315302422
dc.rights.accessOpen Access
drac.iddocument16991782
dc.description.versionPostprint (author's final draft)
upcommons.citation.authorTarrago, J., Jimenez-Pique, E., Schneider, L., Casellas, D., Torres, Y., Llanes, L.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameMaterials science and engineering A. Structural materials properties microstructure and processing
upcommons.citation.volume645
upcommons.citation.startingPage142
upcommons.citation.endingPage149


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