Regensburg 2010 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 34: Liquid and Amorphous Metals I

MM 34.2: Vortrag

Mittwoch, 24. März 2010, 10:30–10:45, H5

Study of structural anisotropy in Zr-Cu bulk metallic glasses under uniaxial compression by computer simulations — •Yue Zhang¹, Nobert Mattern¹, Gang Wang¹, and Jürgen Eckert^{1, 2} — ¹IFW Dresden, Institute for Complex Materials, Helmholtzstr.20, D-01069 Dresden, Germany — ²Institute of Materials Science, TU Dresden, D-01062 Dresden, Germany

The atomic structures of Zr35.5Cu64.5 and Zr50Cu50 bulk metallic glasses (BMGs) under uniaxial compression are studied by reverse Monte Carlo (RMC) and molecular dynamic simulations. The data obtained from in-situ high energy synchrotron diffraction were fitted using RMC simulation. The dynamic structural change during uniaxial compression is studied from both the short range order (SRO) and medium range order (MRO) aspects. The structural anisotropy is characterized by performing Voronoi tessellation, common neighbor and Honeycutt-Anderson analyses to the resulting atomic configurations. Finally, the relationship between MRO and the distribution of icosahedra is discussed.