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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleEffect of the addition of Ta on microstructure and properties of Ti-Nb alloyspt_BR
dc.contributor.authorSouza, SApt_BR
dc.contributor.authorManicardi, RBpt_BR
dc.contributor.authorFerrandini, PLpt_BR
dc.contributor.authorAfonso, CRMpt_BR
dc.contributor.authorRamirez, AJpt_BR
dc.contributor.authorCaram, Rpt_BR
unicamp.authorSouza, S. A. Manicardi, R. B. Caram, R. Univ Estadual Campinas, Fac Mech Engn, Dept Mat Engn, BR-13083970 Campinas, SP, Brazilpt_BR
unicamp.authorFerrandini, P. L. Metalpart Ltda, BR-09991110 Diadema, SP, Brazilpt_BR
unicamp.authorAfonso, C. R. M. Ramirez, A. J. Brazilian Synchrotron Light Lab, Electron Microscopy Lab, BR-13083970 Campinas, SP, Brazilpt_BR
dc.subjectMetals and alloyspt_BR
dc.subjectX-ray diffractionpt_BR
dc.subject.wosShape-memory Behaviorpt_BR
dc.subject.wosBeta-titanium Alloypt_BR
dc.subject.wosBiomedical Applicationspt_BR
dc.subject.wosTensile Propertiespt_BR
dc.subject.wosYoungs Moduluspt_BR
dc.subject.wosAging Responsept_BR
dc.description.abstractThis work is a study of the microstructures and properties of a series of Ti-xNb-yTa alloys (x = 25, 30, 35; y = 0, 2.5, 5, 7.5) (wt. %), solution treated and cooled under the following conditions: furnace cooling (FC), air cooling (AC), oil quenching (OQ) and water quenching (WQ). The results showed the existence of a high density of omega precipitates in FC and AC samples. The microstructures of OQ and WQ alloys containing 25 and 30 wt.% Nb were basically formed by alpha '' martensite and Ti-35Nb-7.5Ta was the only composition where the beta phase was entirely retained. In FC and AC samples, to phase was most responsible for the high values of elastic modulus and hardness, whereas the OQ and WQ samples showed a continuous decrease in elastic modulus due to the high beta retention as the content of alloying elements increased; the WQ sample of composition Ti-35Nb-7.5Ta presented the lowest value of elastic modulus (64 GPa). Hardness tends to decrease with Ta additions. Reduction in area seemed to be independent on Nb and Ta contents but mechanical strength decreased as Nb and Ta percentages increased. Some alloys showed low reduction in area as a consequence of a combination of irregular omega phase distribution and oxygen contamination; these alloys presented the beta phase preferably retained at the periphery of specimens, which is attributed to the fall of M(s) due to the influence of the cooling rate in Ti-alloys containing Nb and Ta elements, since the higher cooling rate are obtained superficially, and the effect of the oxygen contamination. (C) 2010 Elsevier B.V. All rights
dc.relation.ispartofJournal Of Alloys And Compoundspt_BR
dc.relation.ispartofabbreviationJ. Alloy. Compd.pt_BR
dc.publisherElsevier Science Sapt_BR 20pt_BR
dc.identifier.citationJournal Of Alloys And Compounds. Elsevier Science Sa, v. 504, n. 2, n. 330, n. 340, 2010.pt_BR
dc.sourceWeb of Sciencept_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipBrazilian Synchrotron Light Laboratory (LNLS)pt_BR
dc.description.sponsorship1Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
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