Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
STUDY OF Ti-35Nb ALLOY PROCESSED BY POWDER METALLURGY USING CONVENTIONAL 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.COB2021-0986
Abstract
Titanium alloys have a good combination of mechanical and physical properties, including a high strength-to-weight ratio and excellent corrosion resistance. Beta titanium alloys are composed of non-toxic and biocompatible elements, such as niobium, and have a low modulus of elasticity when compared to other materials used in the manufacture of implants, such as stainless steels. Such alloys can be obtained by melting processes in an inert atmosphere or by powder metallurgy processes. Within the presented, 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 conventional pressures (400, 600 and 800 MPa), followed by sintering in an inert atmosphere. The main results show that in the compaction pressures used in this study, there is the occurrence of mechanical twinning in the particles of titanium and also their fracture, as well as changes in the shape of the niobium particles, due to the plastic deformation that occurred during the compaction. After sintering, the recrystallization of the Ti particles was verified. The contour between several Nb particles was eliminated due to the occurrence of atomic diffusion.
Keywords
powder metallurgy, Titanium alloys, conventional pressures
