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MM: Metall- und Materialphysik

MM 36: Amorphous and Liquid Materials IV

MM 36.3: Vortrag

Donnerstag, 30. März 2006, 17:00–17:15, IFW B

Microscopic processes during shear transformation of metallic glasses - a Molecular Dynamic study — •Mareike Zink, Konrad Samwer, and Stefan G. Mayr — 1. Physikalisches Institut, Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

The atomic-scale processes which underlie shear transformation in the model glass, CuTi, were studied with classical Molecular Dynamic computer simulations. The formation of shear bands and dynamical heterogenities below the glass transition temperature could be investigated as well as the influence of boundary conditions. Microscopic results were compared with macroscopic behavior and elastic constants [1]. The shear rate dependence of the shear modulus for various temperatures relected time scales for alpha-relaxation and flow processes in the model glass.

Financially supported by the DFG - SFB 602.

[1] W.L. Johnson and K. Samwer,PRL 95, 195501 (2005)