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 28.7: Vortrag
Mittwoch, 3. April 2019, 17:30–17:45, H45
Fluctuation electron microscopy on PdNiP — •Farnaz Abdollahzadeh Davani1, Sven Hilke1, Harald Rösner1, David Geissler2, Annett Gebert2, and Gerhard Wilde1 — 1Institute of Materials Physics, University of Münster, Münster, Germany — 2Institute for Complex Materials (IKM) Leibniz-Institute for Solid State and Materials Research Dresden (IFW Dresden), Dresden, Germany
Metallic glasses are of interest due to their high strength and hardness. Plastic deformation at low and moderate temperatures is known to lead to localized shear with the formation of so-called shear bands. In this work, a Pd40Ni40P20 bulk metallic glass (BMG) was produced by ingot copper mold casting in a melt spinner under argon atmosphere. Plastic deformation of differently center edge notched beams was imposed under 3-point bending and in-situ monitored by optical microscopy. Undeformed and deformed states are compared using conventional and scanning transmission electron microscopy including high-angle annular dark-field imaging. Nano-beam diffraction patterns were collected and analyzed using variable resolution fluctuation electron microscopy. New insights with respect to structural changes induced by plastic deformation in bulk metallic glasses are discussed.