Application of a titanium filler metal by cold gas dynamic spraying
Authors: Dr. rer. nat. Martin Nicolaus, Prof. Dr.-Ing. habil. Kai Möhwald, Prof. Dr.-Ing. Hans Jürgen Maier
Pure titanium and titanium alloys find numerous applications in lightweight design. These materials are corrosion and oxidation resistant, have a high strength to weight ratio, excellent biocompability and a density which is about 50% lower compared to the one of steel. Typical fields of applications are mechanical and plant engineering, automotive manufacturing, biomedical technology and aerospace. For joining titanium alloys, brazing processes in a high vacuum furnace are often used. In the present study, TiAl6V4 specimens were coated with a powder mixture by cold gas dynamic spraying. The powder consisted of 70% titanium, 15% copper and 15% nickel (mass fractions), representing a common titanium filler metal. The coated specimens were brazed in a high vacuum furnace at 1000°C and the formed microstructure and ultimate tensile strengths (UTS) were investigated. The measured UTS of 450 MPa lies in the range of typical UTS values reported in the literature.
More information about the subscription