Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
CHARACTERIZATION OF Ti-35Nb ALLOY OBTAINED BY POWDER METALLURGY USING HIGH PRESSURES
Submission Author:
Alexandra de Oliveira França Hayama , MT
Co-Authors:
Thailler Machado Nunes da Silva, Hayka Vieira, Sergio Soares, Alexandra de Oliveira França Hayama
Presenter: Thailler Machado Nunes da Silva
doi://10.26678/ABCM.COBEM2021.COB2021-0999
Abstract
The present work presents the results of the microstructural characterization of the Ti-35Nb alloy obtained by powder metallurgy, using uniaxial pressing and high pressures. Beta-type titanium alloys, as alloy studied in this work, are formed by biocompatible elements and can be used as materials for manufacture of orthopedic implants. These alloys can be obtained by melting processes or by powder metallurgy, this being a viable alternative, because is possible to manufacture parts with complex geometries, with dimensions close to the final and good surface finishing. In this context, the objective of this work is to evaluate the microstructural and mechanical behavior of the beta-type titanium alloy, Ti-35Nb (% by weight), obtained by powder metallurgy using uniaxial pressing and high pressures (1000, 1500 and 2000 MPa, followed by sintering in inert atmosphere. The main results show that high pressures favor the occurrence of mechanical twinning in the particles of titanium powders and also their fracture, as well as changes in the shape of the niobium particles, due to the plastic deformation that occurred during compaction. After sintering, the occurrence of recrystallization of the titanium particles was verified, with a tendency of union between the particles that fractured during the compaction.
Keywords
powder metallurgy, Titanium alloys, high pressures
