Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Microstructural and mechanical characterization of the Ti-25Ta-25Nb alloy for biomedical applications
Submission Author:
Adelvam Pereira Júnior , SP
Co-Authors:
ANA PAULA R ALVES CLARO, Adelvam Pereira Júnior
Presenter: Adelvam Pereira Júnior
doi://10.26678/ABCM.COBEM2017.COB17-2693
Abstract
Metallic biomaterials are usually used for replacing the function of hard tissues and also can be used in the manufacturing of biomedical prostheses and implants. Among of the metallic biomaterials stand out the titanium and titanium alloys due great characteristics like biocompatibility. The Ti-25Ta-25Nb alloy is considered a titanium-β alloy of great interest for biomedical application due presents great characteristics like low modulus of elasticity. This present study evaluated the mechanical, microstructural and electrochemical properties of the Ti-25Ta-25Nb alloy after processing using severe plastic deformation (rotary swaging). The alloy was obtained in an arc voltaic melting furnace with an inert atmosphere of argon gas from sheets of pure metals (titanium, niobium, and tantalum). The ingots were heat treated and worked by cold rotary swage (severe plastic deformation). Optical microscopy was used to evaluate the microstructure of the alloy at each processing stage. Traction tests and microhardness were used to evaluate the mechanical behavior of the alloy. Electrochemical analysis (open circuit polarization and potentiodynamic polarization) was used to evaluate corrosion resistance. The ternary alloy showed presence of β phase at each processing stage and 55 GPa of Young's modulus. Also was observed a great corrosion resistance in comparison with comercial alloys. The results showed that the Ti-25Ta-25Nb alloy presented excellent results with this method of processing, therefore being feasible for biomedical applications that’s involving plastic deformation to do components.
Keywords
biomaterials, Titanium alloys, Biomedical applications
