About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Insights Into Intergranular Fracture in Tungsten From Grain Boundary Structure and Statistics |
| Author(s) |
Sajjad Hossain, Gregory Thompson, Christopher R. Weinberger |
| On-Site Speaker (Planned) |
Christopher R. Weinberger |
| Abstract Scope |
The failure of tungsten and similar refractory metals is dominated by intergranular fracture and thus controlled by the structure of the grain boundaries through which the cracks propagate. While grain boundary energetics have been studied systematically, our understanding of the role of grain boundary structure on fracture resistance in these materials limited. In this talk, we explore how grain boundaries give rise to fracture resistance, utilizing atomistic simulations, and explore how this depends on common grain boundary descriptors. These results are then implemented into a statistical model of fracture to understand what key features of the atomistically derived statistics are important for describing intergranular fracture in tungsten and how it competes with transgranular fracture. This work thus establishes a direct connection between interface structure, its statistical representation, and the bulk fracture resistance of tungsten. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, Modeling and Simulation |