| Texto completo | |
| Autor(es): |
Salvador, Camilo A. F.
[1]
;
Dal Bo, Mariana R.
[2]
;
Lima, Dalton D.
[2]
;
Miranda, Caetano R.
[1]
;
Caram, Rubens
[2]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Phys, BR-05508090 Sao Paulo, SP - Brazil
[2] Univ Campinas UNICAMP, Sch Mech Engn, BR-13083860 Campinas, SP - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Materials Science; v. 56, n. 19, p. 11494-11510, JUL 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Among many beta-metastable alloys explored for biomedical applications, alloys from the Ti-Nb-Fe-Zr system present great potential regarding cost and mechanical strength. In this article, we take a new look at the possibility of using Fe as a minor alloying element in the Ti-Nb-Fe-Zr system, with additions up to 2.0 wt% Fe. Additional compositions fixing the Nb/Fe ratio and changing Zr content from 7-13 wt% were also explored, resulting in a total of five different alloys. The samples were solution-treated and then subjected to three different conditions: water-quenched, furnace-cooled, and step-quenched to 450 degrees C for 12 h. Resultant microstructures were analyzed using X-ray diffraction, differential scanning calorimetry, scanning, and transmission electron microscopy. DSC experiments indicate that Zr might alter the phase transformations that occur during heating and cooling cycles. First-principles calculations confirmed that Zr's addition is crucial to reduce the elastic modulus of the beta matrix and increase the omega-phase formation energy relative to beta. All alloys presented mechanical properties suitable for biomedical applications; however, Ti-23Nb-2.0Fe-10Zr (wt %) stands out with the best combination of mechanical strength and elastic modulus after aging. {[}GRAPHICS] . (AU) | |
| Processo FAPESP: | 14/24449-0 - Transformações de fase, microestrutura e propriedades mecânicas de novas ligas de titânio beta metaestáveis do sistema Ti-Nb-Zr-Fe (TNZF) para aplicação biomédica |
| Beneficiário: | Camilo Augusto Fernandes Salvador |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |