Abstract
Titanium alloys parts are ideally suited for advanced aerospace systems because of their unique combination of high specific strength at both room temperature and moderately elevated temperature, in addition to excellent corrosion resistance. Despite these features, use of titanium alloys in engines and airframes is limited by cost. The alloys processing by powder metallurgy eases the obtainment of parts with complex geometry. In this work, results of the Ti-6Al-4V and Ti-13Nb-13Zr alloys production are presented. Samples were produced by mixing of initial metallic powders followed by uniaxial and cold isostatic pressing with subsequent densification by sintering between 900 up to 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. It was shown that the samples were sintered to high densities and presented homogeneous microstructure from the elements dissolution with low interstitial pick-up.
Highlights
The focus of titanium alloy development has shifted from aerospace to industrial applications
The titanium industry will still dependent on the aerospace market and this sector will constitute a significant percentage of total consumption for years to come
Typical engineering applications of titanium alloys include the manufacture of cryogenic devices and aerospace components
Summary
The focus of titanium alloy development has shifted from aerospace to industrial applications. Titanium has unique properties like its high strength-to-weight ratio, good resistance to many corrosive environments and can be used over a wide range of temperatures. Typical engineering applications of titanium alloys include the manufacture of cryogenic devices and aerospace components. (paint is applied when titanium comes into contact with an aluminum or low alloy steel component to prevent galvanic corrosion of the contact material). The titanium alloys production by powder metallurgy, starting from the elemental or prealloyed powders is a feasible route considering its lower costs, versatility and allowing to manufacture parts with complex geometry and near the final dimensions[6,7]. Ti-13Nb-13Zr is a promising candidates for aerospace and military applications[8,9,10]
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