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 Nanoscale Strain Redistributions in Multi-layered Metallic Glasses during In-situ Deformation |
Author(s) |
Lukas Schretter, Simon Fellner, Jürgen Eckert, Christoph Gammer |
On-Site Speaker (Planned) |
Lukas Schretter |
Abstract Scope |
The deformation of metallic glasses (MGs) is characterized by strong strain localizations in shear bands, and rapid propagation thereof. Introducing heterogeneities in the form of secondary phases has proven to be a promising route to overcome this and get ductile materials. Here, we aim to directly map the elastic strain distribution in MGs using nanobeam electron diffraction during in-situ deformation in the TEM. Monolithic Cu64Zr36 and multilayered Cu64Zr36-Cu50Zr50 glassy thin films were synthesized via magnetron sputtering. Bending beams were prepared via FIB milling and tested in situ. The force-displacement curves of the monolithic sample showed pronounced force drops indicating distinct shear banding events, whereas for the multilayered sample, this behavior was vastly suppressed. The strain maps revealed a strong confinement of the elastic strain field to a single layer to be the origin of this enhanced ductility.
This work was supported by the Austrian Science Fund (FWF): Y1236-N37 |
Proceedings Inclusion? |
Planned: |