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MM: Fachverband Metall- und Materialphysik

MM 16: Topical Session: Thermophysical Properties of Bulk Metallic Glasses and Bulk Metallic Glass-forming Liquids

MM 16.5: Topical Talk

Wednesday, March 19, 2025, 11:45–12:15, H10

Structural relaxation and deformation of bulk metallic glasses — •Gerhard Wilde — Institute of Materials Physics, University of Münster, Germany

In metallic glasses, relaxation is discussed in the context of shear transformation zones, viscous flow, structural medium-range order (MRO) and even crystal nucleation. However, the structural origin of different relaxation modes and how these structures change during relaxation, rejuvenation or deformation is rather unclear. In order to address some of these related aspects, calorimetric measurements have been performed together with TEM-based analyses of the local medium range order structures before and after plastic deformation as well as after controlled thermal relaxation. The combined results of macroscopically averaging and spatially resolved analyses are discussed with respect of the correlations between relaxation, deformation and modifications of the MRO structure.

Keywords: bulk metallic glasses; relaxation; medium range order; deformation