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Improving the mechanical strength of ternary beta titanium alloy (Ti-Ta-Sn) foams, using a bimodal microstructure

dc.contributor.authorAguilar C.
dc.contributor.authorAguirre T.
dc.contributor.authorMartínez C.
dc.contributor.authorDe Barbieri F.
dc.contributor.authorMartín F.S.
dc.contributor.authorSalinas V.
dc.contributor.authorAlfonso I.
dc.date.accessioned2020-09-02T22:11:01Z
dc.date.available2020-09-02T22:11:01Z
dc.date.issued2020
dc.identifier10.1016/j.matdes.2020.108945
dc.identifier.citation195, , -
dc.identifier.issn02641275
dc.identifier.urihttps://hdl.handle.net/20.500.12728/3484
dc.descriptionThe effects of a bimodal microstructure and porosity on the elastic modulus and yield strength of a Ti-13Ta-12Sn alloy foam was analyzed. In order to obtain a bimodal microstructure, the powder metallurgy approach was used, with the amount of Sn being chosen depending on a thermodynamic analysis, so that there could be a bcc solid solution after the consolidation process. The foams were obtained using an ammonium carbonate space holder (30, 40 and 50 v/v% porosity). Foams with a bimodal microstructure were synthetized by mixing 50 wt% of milled powder (at 50 h) + 50 wt% unmilled powder, while foam without a bimodal microstructure were synthetized using only milled powders. The elastic modulus and compression yield strength were experimentally measured and compared with estimations given by the Gibson-Ashby model and finite element analysis. The foams with a bimodal microstructure have shown a higher compression strength (over 70 MPa more) than the samples without bimodal microstructure, for all of the porosity values. The samples with bimodal microstructures, as well as 30, 40 and 50% porosity, have an elastic modulus smaller than 30 GPa and a yield strength over 120 MPa, therefore, having a great potential to be explored for biomedical applications. © 2020 The Authors
dc.language.isoen
dc.publisherElsevier Ltd
dc.subjectBimodal microstructure
dc.subjectMechanical properties
dc.subjectMetallic foam
dc.subjectPowder metallurgy
dc.subjectTitanium alloys
dc.subjectCompressive strength
dc.subjectElastic moduli
dc.subjectMedical applications
dc.subjectMicrostructure
dc.subjectNitrogen compounds
dc.subjectPorosity
dc.subjectPowder metallurgy
dc.subjectTantalum alloys
dc.subjectTernary alloys
dc.subjectThermoanalysis
dc.subjectTitanium alloys
dc.subjectYield stress
dc.subjectAmmonium carbonate
dc.subjectBCC solid solution
dc.subjectBeta titanium alloy
dc.subjectBi-modal microstructures
dc.subjectBiomedical applications
dc.subjectCompression strength
dc.subjectConsolidation process
dc.subjectThermo dynamic analysis
dc.subjectTin alloys
dc.titleImproving the mechanical strength of ternary beta titanium alloy (Ti-Ta-Sn) foams, using a bimodal microstructure
dc.typeArticle


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