Regensburg 2019 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 28: Topical session (Symposium MM): Correlative and in-situ Microscopy in Materials Research

MM 28.4: Vortrag

Mittwoch, 3. April 2019, 16:00–16:15, H45

Plasmon characteristics of shear bands in an Al88Y7Fe5 metallic glass — •Maximilian Grove1, Martin Peterlechner1, Harald Rösner1, Gerhard Wilde1, Robert Imlau2, and Alessio Zaccone31Institute für Materialphysik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, D-48149 Münster, Germany — 2FEI Company, Achtseweg Noord 5, 5600 KA Eindhoven, The Netherlands — 3Department of Physics, University of Milan, Via Giovanni Celoria, 16, 20133 Milan, Italy

Shear bands were observed as a result of plastic deformation in cold-rolled Al88Y7Fe5 metallic glass. They display alternating density changes with respect to the matrix (high and low density segments) along their propagation direction. Electron Energy loss spectroscopy (EELS) was used to map the volume Plasmons of shear bands and surrounding matrix. A characteristic Plasmon energy shift of about 10-20 meV relative to the matrix was found for both high and low density segments. For precise analysis, an open source python module (Hyperspy) was utilized to fit the peak shapes by Lorentzian functions and to visualize e.g. the Plasmon energy shift, peak width and height. The experimental results are discussed with respect to the ionic density and the plasmon-phonon interaction.

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