About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
Solute Partitioning and its Influence on Stability and Mechanical Behavior in Nanocrystalline Alloys |
Author(s) |
Thomas Koenig, Ilias Bikmukhametov, Ankit Gupta , Garritt Tucker , Gregory B. Thompson |
On-Site Speaker (Planned) |
Gregory B. Thompson |
Abstract Scope |
Nanocrystalline stability can be achieved through the partitioning of a solute species to the grain boundaries. While this partitioning brings about stability, it also reduces the solid solution strengthening within the material and alters the deformation mechanisms governed by such boundaries. In this presentation, a Ni nanocrystalline alloy with P solute is investigated in terms of its thermal stability and corresponding mechanical hardness. While solid strengthening is reduced by the P partitioning, we demonstrate that this can be mitigated using a ternary addition that remains in solution with Ni, namely Cu. The addition of Cu also influences the kinetics of P partitioning as well as P clusters evolve in the nanostructure. Furthermore, the presence of P in the boundaries alters the mechanisms by which grain boundary deformation is accommodated, revealing a boundary composition and grain size dependence through atomistic simulations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Modeling and Simulation |