Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 48: Topical session: Dynamics, relaxation and deformation in deeply supercooled metallic liquids and glasses III - plasticity and hetererogeneities

MM 48.3: Vortrag

Mittwoch, 22. März 2017, 16:30–16:45, IFW A

Interface controlled plasticity in metallic crystal-glass composites — Constanze Kalcher, Tobias Brink, Omar Adjaoud, and •Karsten Albe — Technische Universität Darmstadt, FB 11, FG Materialmodellierung, Jovanka-Bontschits-Str. 2, 64287 Darmstadt

The mechanical properties of metallic glasses can be modified by secondary phases. In the current contribution we study how the creep and deformation behavior of a metallic glass is altered by the presence of secondary crystalline and glassy phases. By means of molecular dynamics simulations, we show that not only the mechanical properties of the phase fractions but also interfaces affect the mechanical response of a Cu-Zr glass composite. We study various topologies and phase fractions and propose an explanation in terms of interface orientations and a resulting Schmid-like law. We finally show that it is possible to enhance the mechanical properties of nanoglasses by reinforcing their glassy interfaces.