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Mechanical behavior of tungsten-vanadium-lanthana alloys as function of temperature

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dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Materiales Nano-Estructurados y Multifuncionaleses
dc.contributor.authorPalacios, T.
dc.contributor.authorPastor, J.Y.
dc.contributor.authorAguirre, M. V.
dc.contributor.authorMartín, A.
dc.contributor.authorMonge Alcázar, Miguel Ángel
dc.contributor.authorMuñoz Castellanos, Ángel
dc.contributor.authorPareja Pareja, Ramiro
dc.date.accessioned2014-12-18T09:27:26Z
dc.date.available2014-12-18T09:27:26Z
dc.date.issued2011-10
dc.descriptionThis study is presented of: The Fifteenth International Conference on Fusion Reactor Materials (ICFRM-14) was held October 16–22, 2011, at the Charleston Marriott Hotel in Charleston, South Carolina.en
dc.description.abstractThe mechanical behavior of three tungsten (W) alloys with vanadium (V) and lanthana (La₂O₃) additions (W–4%V, W–1%La2O3, W–4%V–1%La₂O₃) processed by hot isostatic pressing (HIP) have been compared with pure-W to analyze the influence of the dopants. Mechanical characterization was performed by three point bending (TPB) tests in an oxidizing air atmosphere and temperature range between 77 (immersion tests in liquid nitrogen) and 1273 K, through which the fracture toughness, flexural strength, and yield strength as function of temperature were obtained. Results show that the V and La₂O₃ additions improve the mechanical properties and oxidation behavior, respectively. Furthermore, a synergistic effect of both dopants results in an extraordinary increase of the flexure strength, fracture toughness and resistance to oxidation compared to pure-W, especially at higher temperatures. In addition, a new experimental method was developed to obtain a very small notch tip radius (around 5–7 μm) and much more similar to a crack through the use of a new machined notch. The fracture toughness results were lower than those obtained with traditional machining of the notch, which can be explained with electron microscopy, observations of deformation in the rear part of the notch tip. Finally, scanning electron microscopy (SEM) examination of the microstructure and fracture surfaces was used to determine and analyze the relationship between the macroscopic mechanical properties and the micromechanisms of failure involved, depending on the temperature and the dispersion of the alloy.en
dc.description.sponsorshipThis investigation was supported by Comunidad de Madrid (SS2009/ MAT-1585), EFDA-ITER (WP12-MAT-W ALLOY), Ministerio de Economía y Competitividad of Spain (ENE2012-39787-C06-05 and MAT2012-38541-c02-02).en
dc.format.extent5
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationJournal of Nuclear Materials, 442 , Issues 1–3, Supplement 1, November. (2013), Pp. 277-281es
dc.identifier.doi10.1016/j.jnucmat.2013.02.006
dc.identifier.issn0022-3115
dc.identifier.publicationfirstpage277
dc.identifier.publicationlastpage281
dc.identifier.publicationtitleJournal of Nuclear Materialses
dc.identifier.publicationvolume442
dc.identifier.urihttps://hdl.handle.net/10016/19798
dc.identifier.uxxiCC/0000022064
dc.language.isoeng
dc.publisherElsevieren
dc.relation.eventdate2011-Octubre-16-22es
dc.relation.eventnumber15
dc.relation.eventplaceCharleston (Estados Unidos de América)es
dc.relation.eventtitleInternational Conference on Fusion Reactor Materials (ICFRM-15)en
dc.relation.projectIDComunidad de Madrid. S2009/MAT-1585/ESTRUMATes
dc.relation.projectIDGobierno de España. ENE2012-39787-C06-05
dc.relation.projectIDGobierno de España. MAT2012-38541-C02-02
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.jnucmat.2013.02.006
dc.rights© 2013 Elsevier B.Ves
dc.rights.accessRightsopen access
dc.subject.ecienciaFísicaes
dc.subject.ecienciaMaterialeses
dc.titleMechanical behavior of tungsten-vanadium-lanthana alloys as function of temperatureen
dc.typeconference output*
dc.type.hasVersionAM*
dspace.entity.typePublication
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