| Abstract: |
As light metals, pure titanium and titanium alloys find numerous applications. These materials are corrosive- and oxidation resistant, have a high strength to weight ratio, have a high biocompability and a density which is about 50% lower compared to the density of steel. Typical fields of applications are mechanical and plant engineering, automotive manufacturing, medical technology and aerospace technology. For example the titanium alloy TiAl6V4 is used for the fan blades and the compressor in a jet engine. For joining titanium alloys, besides welding the brazing process in a high vacuum furnace is used. The filler metal is provided in form of pastes, foils and powders and is usually applied manually to the joining parts. In this contribution TiAl6V4 specimens are coated with a powder mixture by cold gas dynamic spraying, consisting of 70 wt.% titanium, 15 wt.% copper and 15 wt.% nickel, representing a common titanium filler metal. The coated specimens are brazed in a high vacuum furnace at 1000 °C and the formed microstructure and ultimate tensile strengths are investigated. The results show the feasibility to apply titanium filler metals by cold gas dynamic spraying.
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