Berlin 2012 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 17: Poster Session
MM 17.26: Poster
Montag, 26. März 2012, 17:00–19:00, Poster B
Texture gradient in ultrafine-grained Ti/Al composite wires produced by accumulative swaging and bundling — •Andy Eschke1, Juliane Scharnweber1, Carl-Georg Oertel1, Tom Marr1,2, Jan Romberg1,2, Jens Freudenberger2,3, Uta Kühn2, Ludwig Schultz1,2, Jürgen Eckert1,2, and Werner Skrotzki1 — 1Institut für Strukturphysik, Technische Universität Dresden, Germany — 2Institut für Festkörper- und Werkstoffforschung Dresden, Germany — 3Institut für Werkstoffwissenschaft, TU Bergakademie Freiberg, Germany
Various top-down processes of severe plastic deformation (SPD) like equal channel angular pressing, high pressure torsion or accumulative roll bonding are well known for producing ultrafine-grained (ufg) microstructures. The evolution of texture with respect to deformation by an alternative SPD process, called accumulative swaging and bundling (ASB), is shown for ufg Ti/Al wires, suitable for structural materials because of their high specific strength. An Al rod was stacked into a Ti tube and swaged with an area reduction of approximately 20% per pass to a logarithmic strain of 4.3. The resulting composite wire was cleaned, cut into 37 pieces, stacked into a Ti tube (of initial dimension) in a hexagonal arrangement and then swaged again. This procedure can be repeated arbitrarily. The texture gradient of the ASB composites was studied using a X-ray micro diffraction system D8 DISCOVER (Bruker AXS GmbH) equipped with a micro focus X-ray tube IµS and an area detector Vantec-2000. The results will be discussed with respect to processing and grain refinement.