Influence Of Si Addition On The Microstructure And Mechanical Properties Of Ti-35nb Alloy For Applications In Orthopedic Implants

dc.creatorTavares
dc.creatorA. M. G.; Ramos
dc.creatorW. S.; de Blas
dc.creatorJ. C. G.; Lopes
dc.creatorE. S. N.; Caram
dc.creatorR.; Batista
dc.creatorW. W.; Souza
dc.creatorS. A.
dc.date2015-NOV
dc.date2016-06-07T13:19:04Z
dc.date2016-06-07T13:19:04Z
dc.date.accessioned2018-03-29T01:39:18Z
dc.date.available2018-03-29T01:39:18Z
dc.identifier
dc.identifierInfluence Of Si Addition On The Microstructure And Mechanical Properties Of Ti-35nb Alloy For Applications In Orthopedic Implants. Elsevier Science Bv, v. 51, p. 74-87 NOV-2015.
dc.identifier1751-6161
dc.identifierWOS:000362603900007
dc.identifier10.1016/j.jmbbm.2015.06.035
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S1751616115002428
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/242613
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1306311
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionIn the development of new materials for orthopedic implants, special attention has been given to Ti alloys that show biocompatible alloy elements and that are capable of reducing the elastic modulus. Accordingly, Ti-Nb-Si alloys show great potential for application. Thus, this is a study on the microstructures and properties of Ti-35Nb-xSi alloys (x=0, 0.15, 0.35 and 0.55) (wt%) which were thermally treated and cooled under the following conditions: furnace cooling (FC), air cooling (AC), and water quenching (WQ). The results showed that Si addition is effective to reduce the density of omega precipitates making beta more stable, and to produce grain refinement. Silicides, referred as (Ti,Nb)(3)Si, were formed for alloys containing 0.55% Si, and its formation presumably occurred during the heating at 1000 degrees C. In all cooling conditions, the hardness values increased with the increasing of Si content, as a result from the strong Si solid solution strengthening effect, while the elastic modulus underwent a continuous reduction due to the reduction of omega precipitates in beta matrix. Lower elastic moduli were observed in water-quenched alloys, which concentration of 0.15% Si was more effective in their reduction, with value around 65 GPa. Regarding Ti-35Nb-xSi alloys (x=0, 0.15 and 0.35), the "double yield point" phenomenon, which is typical of alloys with shape memory effect, was observed. The increase in Si concentration also produced an increase from 382 MPa to 540 MPa in the alloys mechanical strength. Ti-35Nb-0.55Si alloy, however, showed brittle mechanical behavior which was related to the presence of silicides at the grain boundary. (C) 2015 Elsevier Ltd. All rights reserved.
dc.description51
dc.description
dc.description
dc.description74
dc.description87
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCNPq [477340/2013-0]
dc.description
dc.description
dc.description
dc.languageen
dc.publisherELSEVIER SCIENCE BV
dc.publisher
dc.publisherAMSTERDAM
dc.relationJOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
dc.rightsembargo
dc.sourceWOS
dc.subjectTi-nb Alloys
dc.subjectInduced Martensitic-transformation
dc.subjectShape-memory Alloy
dc.subjectStress-induced Martensite
dc.subjectBiomedical Applications
dc.subjectTitanium-alloys
dc.subjectTrigger Stress
dc.subjectPhase-transformations
dc.subjectIsothermal Section
dc.subjectTensile Properties
dc.titleInfluence Of Si Addition On The Microstructure And Mechanical Properties Of Ti-35nb Alloy For Applications In Orthopedic Implants
dc.typeArtículos de revistas


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