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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.date.accessioned2016-03-02T15:37:52Z
dc.date.available2016-03-02T15:37:52Z
dc.date.issued2016-02-17
dc.identifier.citationInternational Journal of Material Forming, 1-9 (2016)en
dc.identifier.issn1960-6214en
dc.identifier.urihttp://hdl.handle.net/11556/141
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.sponsorshipGobierno de España, Ministerio de Economía y Competitividad. Financial suport by the Spanish MINECO, projects MAT2008-06475 and MAT2012-38962, is acknowledgeden
dc.language.isoengen
dc.publisherSpringer Parisen
dc.titleModelling the optimum hot workability of TiB reinforced Ti-6Al-4 V alloy by stability mapsen
dc.typearticleen
dc.identifier.doi10.1007/s12289-016-1287-6en
dc.isiYesen
dc.rights.accessRightsembargoedAccessen
dc.subject.keywordsReinforced titanium materialsen
dc.subject.keywordsHot workabilityen
dc.subject.keywordsHot compression testsen
dc.subject.keywordsModellingen
dc.subject.keywordsForming mapsen


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