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Metals 2013, 3(2), 188-201; doi:10.3390/met3020188

Processing of Intermetallic Titanium Aluminide Wires

, 1,3,* , 1,2
, 1,2
, 1
, 1
, 4
, 4
, 4
, 1
, 1
, 4
 and 1,2
1 IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany 2 TU Dresden, Institut für Werkstoffwissenschaft, 01062 Dresden, Germany 3 TU Bergakademie Freiberg, Institut für Werkstoffwissenschaft, Gustav Zeuner Strasse 5, 09599 Freiberg, Germany 4 TU Dresden, Institut für Strukturphysik, 01062 Dresden, Germany
* Author to whom correspondence should be addressed.
Received: 7 April 2013 / Revised: 24 April 2013 / Accepted: 26 April 2013 / Published: 10 May 2013
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This study shows the possibility of processing titanium aluminide wires by cold deformation and annealing. An accumulative swaging and bundling technique is used to co-deform Ti and Al. Subsequently, a two step heat treatment is applied to form the desired intermetallics, which strongly depends on the ratio of Ti and Al in the final composite and therefore on the geometry of the starting composite. In a first step, the whole amount of Al is transformed to TiAl3 by Al diffusion into Ti. This involves the formation of 12% porosity. In a second step, the complete microstructure is transformed into the equilibrium state of -TiAl and TiAl3. Using this approach, it is possible to obtain various kinds of gradient materials, since there is an intrinsic concentration gradient installed due to the swaging and bundling technique, but the processing of pure -TiAl wires is possible as well.
Keywords: Ti; Al; titanium aluminide; wire; phase reaction Ti; Al; titanium aluminide; wire; phase reaction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Marr, T.; Freudenberger, J.; Kauffmann, A.; Romberg, J.; Okulov, I.; Petters, R.; Scharnweber, J.; Eschke, A.; Oertel, C.-G.; Kühn, U.; Eckert, J.; Skrotzki, W.; Schultz, L. Processing of Intermetallic Titanium Aluminide Wires. Metals 2013, 3, 188-201.

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