Three Step Fabrication of the Titanium Trophy
The Titanium Information Group (TIG) has recently announced the winners of both the Harvey Flower Prize and the trophy
Dr Brad Wynne, a Senior Lecturer in Metallurgy at the University of Sheffield, was nominated by Prof Mark Rainforth, Head of the Materials Science and Engineering Department for his work in the field of titanium. During Dr Wynne’s 12 years at the University he has made internationally recognised contributions to the understanding of the thermochemical processing of titanium. He has developed novel techniques to map the texture over large area, but with high spatial resolution, and to reconstruct the high temperature structure from the room temperature structure. His work also extends to the friction stir welding of titanium alloys and he has brought new insight to the deformation mechanisms which are crucial to optimising the process.
Following a unanimous vote from the judges, GrowthObjects, which is based in Barcelona, was announced as the winner of the trophy design. The judges felt that this design combined the attributes of the strength and lightness of titanium alloys with the design freedom afforded by the additive layer manufacturing technique. A visually striking object with influences of nature,
it aptly demonstrates how advanced manufacturing techniques are enabling the fabrication of unique and efficient designs.
3D printing - From Picture to Object
The Mercury Centre generously donated their time to creating the trophy. An Arcam AB electron beam machine was used to construct the trophy, which weighs in at 1Kg. A video that shows how the process works can be found by scanning the QR code below using a smartphone.
A Touch of Colour
Alternatively, it can be accessed through the online version of this journal at www.namtec.co.uk
The final stage of the process is due to be carried out by Poligrat UK, specialists in metal surface technology. To obtain the colours seen in the picture below, the titanium underwent a process called anodising which imparts permanent colour on the metal via an electrochemical process. The process works by altering the oxide levels of the metals surface which changes the spectrum of light, resulting in perceived colour. The spectrum of colours that can be achieved on titanium includes bronze, blues, blue-white, yellow, magenta, cyan and green. The colours formed are dependant on the thickness of the oxide layer, which in turn, is determined by the anodising voltage. Although, to obtain the higher voltage colours (magenta and greens) the surface must be etched.
Anodising is used to colour code components in several
industries. In medical and dental applications, components are colour coded by size for ease of identification. Similarly, the assembly of complex parts in an electronic/mechanical device, or in the aerospace industry can be made easier with the use of colour coding. However, in some applications, anodising is not purely used for aesthetics. The process also improves the metals’ resistance to corrosion by hardening the metal.
To learn more about titanium, its unique properties, processes and applications come along to NAMTEC’s one day ‘Titanium Metallurgy’ training course on 20th November.
or call 01709723754 for more information.
10 The National Metals Technology Centre Quarterly Journal
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