Regensburg 2013 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 65: Liquid & Amorphous Metals II
MM 65.3: Vortrag
Donnerstag, 14. März 2013, 17:45–18:00, H26
Diffusion and relaxation in a HPT-deformed Zr-based bulk metallic glass — •Jonas Bünz1, Koichi Tsuchiya2, Sergiy Divinsky1, and Gerhard Wilde1 — 1Institut für Materialphysik, WWU Münster — 2National Institute for Materials Science, University of Tsukuba
Metallic glasses are still an attractive object of investigation in the field of materials physics due to their outstanding mechanical properties. Hardness and yield strength exceed the values of their crystalline counterpart by far, but the applicability of metallic glasses is limited by the lack of considerable plasticity. Stress localization and the associated shear softening strongly weaken the structure, thus leading to the formation of shear bands. The structure of shear bands is still far from being understood. Due to their extreme sensitiveness to the free volume localization, the diffusion measurements by the radiotracer technique can bring further insight into the structural modifications of shear bands with respect to the amorphous matrix as well as to the conditions of slip during plastic straining. Here, we present the results of diffusion as well as relaxation experiments in HPT-deformed Zr-based bulk metallic glass.