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MM: Fachverband Metall- und Materialphysik

MM 34: Poster Session

MM 34.28: Poster

Tuesday, April 1, 2014, 18:00–20:00, P4

Solute content and structural configuration dependent mechanical properties of nanocrystalline PdAu alloys — •Nicole Fèvre, Christian Braun, Michael Deckarm, Jonas Heppe, Andreas Leibner, and Rainer Birringer — Universität des Saarlandes, FR 7.2 Experimentalphysik, Campus D2.2, 66123 Saarbrücken

We investigate elasticity and plasticity of nanocrystalline PdAu by systematically varying the Au concentration. From calorimetry we find that grain boundaries in as-prepared specimens manifest non-equilibrium configurations. Thermal annealing leads to grain boundary relaxation and so local equilibrium configurations are generated. In particular, we determine high frequency elastic moduli and Vickers hardness for as-prepared and relaxed specimens and discuss the composition-dependent evolution of strength.