Obtainment of Beta Titanium Alloys for Aerospace Applications by Powder Metallurgy

The titanium is on excellent material for fabrication of aerospace springs in substituting to steels, due to its high corrosion resistance, 60% lower density, and lower elastic modulus. The production of the titanium alloys by powder metallurgy (M/P), starting from the elemental powders is a feasible route considering its lower costs and versatility. In this work, results of the Ti-3Al-8V-6Cr-4Mo-4Zr (β-C) and Ti-35Nb-7Zr-5Ta alloys production are presented. Samples were cold isostatic pressing (350 MPa) with subsequent densification by sintering at 1200, 1400 and 1500 °C, in vacuum. Sintered samples were characterized for phase composition, microstructure and microhardness by X-ray diffraction, scanning electron microscopy and Vickers indentation, respectively. Density was measured by Archimedes method. It was shown that the samples were sintered to high densities and presented homogeneous microstructure.