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dc.contributor.authorLlanes Pitarch, Luis Miguel
dc.contributor.authorCasas Aguirregomezcorta, Begoña
dc.contributor.authorSalán Ballesteros, Maria Núria
dc.contributor.authorMestra Rodríguez, Álvaro Miguel
dc.contributor.authorTorres Hernández, Yadir
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.identifier.citationLlanes, L. [et al.]. Fatigue performance improvement of electrical discharge machined hardmetals by means of combined thermal annealing and surface modification routes. "International journal of refractory metals and hard materials", Gener 2013, vol. 36, p. 60-65.
dc.description.abstractElectrical discharge machining (EDM) provides an effective means of shaping hardmetals. However, it is also known that surface integrity of these materials may be affected by EDM, degrading their tribomechanical characteristics. This work focuses on assessing the use of two different surface modification routes: thermomechanical treatments (shot blasting, polishing and final high temperature annealing) and/or physical vapor deposition of hard coatings, for improving the fracture and fatigue strength of an EDM-shaped fine-grained hardmetal grade. In doing so, an optimal EDM's surface finish variant and a diamond ground and polished one are used. Mechanical behavior is evaluated under four-point bending and fatigue characterization is given in terms of fatigue limit following the staircase method. Experimental results indicate that both approaches markedly decrease the lessening effect of EDM on the mechanical strength of hardmetals, although a complete fracture and fatigue strength retention is only achieved by combining both of them. The improved mechanical behavior is rationalized on the basis of the beneficial changes induced by surface modification on the effective residual stress field at the surface of EDM-shaped hardmetals, as assessed by a linear elastic fracture mechanics analysis combined with fractographic examination.
dc.format.extent6 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials::Assaig de fractura
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica
dc.subject.lcshFracture mechanics
dc.subject.lcshMaterials Fatigue
dc.subject.otherCemented carbides WC-Co
dc.subject.otherElectrical discharge machining
dc.subject.otherFatigue strength
dc.subject.otherResidual stresses
dc.subject.otherSurface modification
dc.titleFatigue performance improvement of electrical discharge machined hardmetals by means of combined thermal annealing and surface modification routes
dc.subject.lemacAssaigs de materials -- Propietats mecàniques
dc.contributor.groupUniversitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural i Fiabilitat dels Materials
dc.contributor.groupUniversitat Politècnica de Catalunya. GIOPACT - Grup de recerca d'Igualtat d'Oportunitats en l'Arquitectura, la Ciència i la Tecnologia
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
upcommons.citation.authorLlanes, L.; Casas, B.; Salán, N.; Mestra, A.; Torres, Y.
upcommons.citation.publicationNameInternational journal of refractory metals and hard materials
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Salvo que se indique lo contrario, los contenidos de esta obra estan sujetos a la licencia de Creative Commons: Reconocimiento-NoComercial-SinObraDerivada 3.0 España