About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale VIII
|
| Presentation Title |
Nanomechanical Fracture Behavior Along Distinct Lamellar Interfaces in an advanced TiAl Alloy |
| Author(s) |
Michael Burtscher, Christoph Gammer, Simon Fellner, Onur Can Şen, Rebecca Janisch, Daniel Kiener |
| On-Site Speaker (Planned) |
Michael Burtscher |
| Abstract Scope |
Ongoing efforts to improve the high-temperature properties of TiAl alloys led to high-strength, yet increasingly brittle, alloys. Therefore, knowledge of the fracture properties of these materials is crucial for their use in demanding environments. This study investigates the fracture properties of α2/γ-colonies of an advanced TNM+ alloy along the different distinct lamellar interfaces. This was achieved by conducting in situ nanomechanical testing of notched cantilevers within a transmission electron microscope. During the experiment, the onset of fracture, crack propagation and designated 4D strain-maps were recorded. With this, the onset stress of dislocation emission, as well as the time resolved conditional fracture toughness and J integral values were determined for each interface type. This data was compared to results from MD simulations. These findings improve our understanding of fracture mechanisms in lamellar microstructures and offer insights for the future design of these alloys to improve ductility and toughness at room temperature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Temperature Materials, Other |