Modelling the optimum hot workability of TiB reinforced Ti-6Al-4 V alloy by stability maps

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dc.contributor.authorGarcía de Cortázar, Maider
dc.contributor.authorPeñalba, Felix
dc.contributor.authorSilveira, Elena
dc.contributor.authorGómez-Mitxelena, Xabier
dc.contributor.authorCarsí, Manuel
dc.contributor.authorRuano, Oscar A.
dc.contributor.institutionTecnalia Research & Innovation
dc.contributor.institutionCIRMETAL
dc.contributor.institutionCaracterización y Validación. Materiales
dc.contributor.institutionEXTREMAT
dc.date.issued2016-02-17
dc.descriptionPublisher Copyright: © 2016, Springer-Verlag France.
dc.description.abstractHot workability of Ti-6%Al-4%V and two whisker discontinuously reinforced materials, Ti-6%Al-4%V/1.2%TiB and Ti-6%Al-4%V/8.9%TiB, have been investigated. Hot uniaxial compression tests were carried out using a computer controlled thermomechanical simulator Gleeble machine at temperatures in the range 850 °C to 950 °C and strain rates ranging from 1 to 50 s−1. The microstructures and the compression test results were compared among the three materials. The Ti-6%Al-4%V/8.9%TiB material presented extensive cracking after deformation. In contrast, the Ti-6%Al-4%V/1.2%TiB material showed an interesting compromise between flow stress and workability. The parameters of the Garofalo equation were calculated for the three materials revealing apparent activation energies that increased with increasing TiB content. The modelling is carried out by stability maps that gives the temperature at a given strain rate to obtain optimal workability and the stresses that has to bear the equipment. Taken 5 s−1 as a reference strain rate, the temperature required to obtain a quality product increased from about 1143 K (870 °C) for the Ti-6-4 alloy without TiB to 1228 K (955 °C) for the 1.2%TiB and to 1283 K (1010 °C) for the 8.9%TiB material. Therefore, the production of parts of the TiB composites should be conducted at a higher forming temperature to avoid the presence of cracksen
dc.description.statusPeer reviewed
dc.format.extent9
dc.format.extent1677282
dc.identifier.citationGarcía de Cortázar , M , Peñalba , F , Silveira , E , Gómez-Mitxelena , X , Carsí , M & Ruano , O A 2016 , ' Modelling the optimum hot workability of TiB reinforced Ti-6Al-4 V alloy by stability maps ' , unknown , vol. unknown , no. 3 , pp. 379-387 . https://doi.org/10.1007/s12289-016-1287-6
dc.identifier.doi10.1007/s12289-016-1287-6
dc.identifier.otherresearchoutputwizard: 11556/141
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=84958777629&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofunknown
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsReinforced titanium materials
dc.subject.keywordsHot workability
dc.subject.keywordsHot compression tests
dc.subject.keywordsModelling
dc.subject.keywordsForming maps
dc.subject.keywordsReinforced titanium materials
dc.subject.keywordsHot workability
dc.subject.keywordsHot compression tests
dc.subject.keywordsModelling
dc.subject.keywordsForming maps
dc.subject.keywordsGeneral Materials Science
dc.subject.keywordsFunding Info
dc.subject.keywordsGobierno de España, Ministerio de Economía y Competitividad. Financial suport by the Spanish MINECO, projects_x000D_ MAT2008-06475 and MAT2012-38962, is acknowledged
dc.subject.keywordsGobierno de España, Ministerio de Economía y Competitividad. Financial suport by the Spanish MINECO, projects_x000D_ MAT2008-06475 and MAT2012-38962, is acknowledged
dc.titleModelling the optimum hot workability of TiB reinforced Ti-6Al-4 V alloy by stability mapsen
dc.typejournal article
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