Relationship between microstructure, phase transformation, and mechanical behavior in Ti-40Ta alloys for biomedical applications
| Autor: | Rui Vilar, P.W.B. Marques, Paulo Sergio Carvalho Pereira da Silva, M.A. Tito Patricio, Javier Andres Muñoz Chaves, C.J.R. Lustosa, Amélia Almeida, O. Florêncio |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Scanning electron microscope Alloy Ti–40Ta alloy chemistry.chemical_element engineering.material Biomaterials Differential scanning calorimetry Phase (matter) Internal friction Composite material Elastic modulus TITÂNIO Mining engineering. Metallurgy Metals and Alloys TN1-997 Microstructure Surfaces Coatings and Films chemistry Mechanical spectroscopy Ceramics and Composites engineering Orthorhombic crystal system Titanium Biomedical alloys |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Journal of Materials Research and Technology, Vol 14, Iss, Pp 210-219 (2021) |
| Popis: | Titanium and Ti alloys are important materials for scientific and technological applications, especially as biomaterials, due to their excellent corrosion resistance, biocompatibility, and mechanical properties. In this work, the influence of tantalum on the microstructure and mechanical properties of Ti–40Ta alloys were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and mechanical spectroscopy (MS) techniques. XRD and SEM analyses showed that commercially pure (CP) Ti consists of a single α-phase (hcp) with an equiaxed morphology, while Ti–40Ta alloy consists of α" (orthorhombic) and β (bcc) phases. The anelastic relaxation spectra of Ti–40Ta alloy presented characteristics combining CP Ti and pure Ta anelastic responses, where the complex anelastic relaxation peaks observed around 575 and 680 K could be resolved into matrix-interstitial and substitutional-interstitial components, corresponding to Ta–O, Ti–O, and Ta–N single interactions. The combination of thermal cycles and applied stress during the mechanical spectroscopy characterization of Ti–40Ta alloy promotes the α" → β phase transition until β phase stabilization. From flexural vibration measurements, the elastic modulus values at room temperature were: (102 ± 9) GPa for CP Ti and (71 ± 5) GPa for the Ti–40Ta alloy. These results provide a valuable contribution to a better understanding of the structure and mechanical properties of the Ti–40Ta alloy, thus allowing the optimization of its properties through thermal treatments, aiming at its potential application as a biomaterial for structural orthopedic applications. |
| Databáze: | OpenAIRE |
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