Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
TRIBO-MECHANICAL BEHAVIOR OF Ti-25Nb AND Ti-25Nb-25Ta DUE THE ADDITION OF BETA STABILIZERS ELEMENTS
Submission Author:
Aline da Luz , PR
Co-Authors:
Aline da Luz, Gregory Beilner, Carlos Siqueira, Gelson B. de Souza, Carlos Lepienski, José Nogueira Athayde, ANA PAULA R ALVES CLARO, Neide Kuromoto
Presenter: Aline da Luz
doi://10.26678/ABCM.COBEM2017.COB17-2922
Abstract
The mechanical and tribological properties of the commercial pure titanium (Ti-cp), Ti-25Nb and Ti-25Nb- 25Ta alloys for biomedical applications were investigated. Metallographic analysis and patterns of X-Ray diffraction indicate that the Ti-25Nb alloy is composed by (α+β) phases, and the Ti-25Nb-25Ta alloy by β-phase. The results obtained by instrumented indentation technique showed that the addition of beta stabilizer elements in alloys decreases the elastic modulus values and increase the hardness values of both alloys, comparing to cp-Ti. The coefficient of friction, performed in reciprocating tribometer against WC ball, showed that the Ti-25Nb-25Ta alloy presented higher values compared to others metals, and showed higher wear rate. Worn tracks revealed abrasive and adhesive wear for all metal. However, a severe abrasive wear was observed for Ti-25Nb alloy, whereas a severe adhesive wear for Ti- 25Nb-25Ta. All results showed that mechanical and tribological properties depend on the alloys microstructure (α+β or β) and the addition of beta stabilizer elements (Nb and Ta).
Keywords
β-titanium alloy, α+ β-titanium alloy, Mechanical Properties, Wear, coefficient of friction
