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MM: Fachverband Metall- und Materialphysik

MM 26: Poster Session

MM 26.21: Poster

Dienstag, 23. März 2010, 14:45–16:30, Poster C

Anisotropic mechanical behavior of the ultrafine grained TiFe eutectic system — Antje Schlieter, •Uta Kühn, and Jürgen Eckert — Helmholtzstrasse 20, IFW Dresden, 01171

The effect of temperature gradient and growth rate of an eutectic TiFe alloy have been examined. Samples have been arc melted ingots, cold crucible and tilt cast rods and rods cast by Bridgeman technique. The material exhibit different nanoscaled/ultrafine grained (ns/ufg) eutectic structure (β-Ti(Fe) solid solution (ss) + TiFe). Different cooling conditions lead to the evolution of ufg eutectic colonies with different orientation versus elongated lamella colonies with preferred orientation. Consequently, isotropic versus anisotropic mechanical properties were obtained. The alloys exhibit compressive strengths between 2200 - 2700 MPa and plasticity in the range of 7 to 19 % in compression.