| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
100 Years and Still Cracking: A Griffith Fracture Symposium
|
| Presentation Title |
On the Fracture of Multi-element Metallic Alloys |
| Author(s) |
Bernd Gludovatz, Robert O. Ritchie |
| On-Site Speaker (Planned) |
Bernd Gludovatz |
| Abstract Scope |
There are two classes of advanced metallic alloys of current interest with compositions which consist of multiple elements, namely bulk-metallic glasses and high-entropy alloys, the former alloys naturally being amorphous, the latter fully polycrystalline and often primarily single phase. Specific alloys in both categories display combinations of strength and toughness that represent some of the best on record, although the mechanisms underlying this behavior can be quite different. We will examine these toughening mechanisms underlying such exceptional damage-tolerance. In addition, we explore the highly variable nature of the measured toughness of bulk-metallic glasses, in terms of the fact that nonlinear-elastic fracture mechanics may be inappropriate for unambiguous measurement due to insufficient strain hardening, and the presence of unstable states of local order in the amorphous state that can have a profound effect on the nucleation of shear-bands, which represents the fundamental essence of plasticity, and hence toughness, in metallic glasses. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Entropy Alloys, Other |