About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Theory and Design of Metallic Glasses
|
| Presentation Title |
Using 4D-STEM to Link Structure and Shear Band Propagation in Metallic Glasses |
| Author(s) |
Christoph Gammer, Simon Fellner, Lukas Schretter, Jürgen Eckert |
| On-Site Speaker (Planned) |
Christoph Gammer |
| Abstract Scope |
Metallic glasses (MGs) suffer from limited ductility due to the formation of shear bands (SBs). While atomistic simulations have demonstrated the importance of structural heterogeneities and local stresses for the initiation and propagation of SBs, experimental studies are still scarce. Here we show that 4D scanning TEM (STEM) using precession nanodiffraction mapping allows to map the atomic density and atomic strain distribution of an individual shear band at < 2 nm resolution. By comparing MGs with different structural states, we demonstrate that that the shear banding process is closely linked to the initial structure of the glass. In addition, to study the early stages of deformation localization in MGs, in situ deformation in the TEM is carried out using a nanoindenter holder allowing to draw a more direct structure-property relationship for MGs containing structural heterogeneities.
This work was supported by the Austrian Science Fund (FWF): Y1236-N37 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, |