About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
Observation of Deformation Features in Metallic Glasses |
Author(s) |
Sangjun Kang, Xiaoke Mu, Di Wang, Arnaud Caron, Christian Minnert, Karsten Durst, Christian Kuebel |
On-Site Speaker (Planned) |
Christian Kuebel |
Abstract Scope |
The application of metallic glasses is limited by their lack of toughness and catastrophic failure during plastic deformation. However, the underlying shear banding mechanisms are still not fully established and understanding the structure of shear bands, their formation and interaction is essential to establish a general theory of the nature of glasses and their mechanical deformation.
We have developed a 4-dimensional scanning transmission electron microscopy (4D-STEM) technique to not only map nanoscale pair distribution function (PDF) variations, but further investigate strain and packing/density variations at the nanoscale in deformed metallic glasses. Using this new approach, we discovered Eshelby-like quadrupolar strain fields percolated along shear bands and their correlation with packing/density variations on the shear bands. These results provide direct experimental data about the deformation structures in metallic glasses and help to understand the differences between brittle and more ductile glasses. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Other, |