About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Refractory Metals 2024
|
Presentation Title |
Understanding the Role of Thermally Activated Dislocation Motion on the Brittle to Ductile Transition in BCC Metals |
Author(s) |
Hunter Brumblay, Gregory Thompson, Christopher R. Weinberger |
On-Site Speaker (Planned) |
Christopher R. Weinberger |
Abstract Scope |
Processing of refractory BCC metals like tungsten and molybdenum can be difficult due to their brittle nature at room temperature and thus require thermomechanical processing while others like tantalum are substantially more ductile. The origins of this discrepancy has not been fully understood but is likely influenced by both impurities and/or intrinsic dislocation mobility. In this talk, we examine the role thermally activated dislocations play in determining the brittle to ductile transition temperature (BDTT) in the BCC refractory metals. Specifically, we use a discrete dislocation dynamics model to predict the BDTT using dislocation mobility based on both experiments and kinetic Monte Carlo modeling. These results demonstrate to what extent that intrinsic mobility can explain these differences in the BDTT. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Mechanical Properties, High-Temperature Materials |