Filomeno will present on Wednesday 10th August, during the "Materials V: Cross-Cutting Materials" session. The abstract is the following:
Wire + Arc Additive Manufacturing of Refractory Metals (G. Marinelli, F. Martina, S. Ganguly, S. W. Williams)
Refractory metals have intrinsic low-temperature brittleness, poor weldability and a high susceptibility to oxidation over a large temperature range. These properties present limitations in various steps of manufacture. Today, refractory metals components are mostly produced through powder metallurgy route. Wire + Arc Additive Manufacture (WAAM) produces fully dense parts at relatively low cost, by depositing high-quality wire. Using WAAM with an arc power of around 6 kW and low travel speed, linear structures in molybdenum, tungsten and tantalum have been produced. Despite substrates suffer from high deformation or even cracking, the as-deposited structures are free from internal cracks and the layer dimensions are stable during the process. Thus, it is demonstrated that WAAM can produce parts in refractory metals by fusion process, with the characteristic freedom of 3D printing.