About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Mapping Local Strain in Metallic Glass Composites during In Situ Deformation in the TEM |
Author(s) |
Christoph Gammer, Simon Fellner, Lukas Schretter, Jürgen Eckert |
On-Site Speaker (Planned) |
Christoph Gammer |
Abstract Scope |
Metallic glasses (MGs) show attractive properties but suffer from limited ductility at room temperature. To overcome this limitation, crystalline secondary phases can be introduced. Progress has been made to produce novel metallic glass composites (MGCs) with improved mechanical properties but a fundamental understanding of their nanoscale deformation mechanisms is still lacking as their disordered nature hinders direct imaging of their atomic structure in the transmission electron microscope (TEM). Here we show that 4D STEM using nanodiffraction mapping allows to reveal the atomic density and strain in both, crystalline and amorphous volume fractions at 2 nm resolution. To study the early stages of deformation localization in MGCs, in situ deformation in the TEM is carried out. This allows to quantify strain concentrations at the crystal-amorphous interfaces and thus provide a more direct link between structure and properties of MGCs.
This work was supported by the Austrian Science Fund (FWF): Y1236-N37 |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, |