| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Uncovering the Nanoscale Mechanisms Governing Thermomechanical Properties in Solute-stabilized Nanocrystalline Alloys |
| Author(s) |
Ankit Gupta, Gregory B. Thompson, Garritt J. Tucker |
| On-Site Speaker (Planned) |
Garritt J. Tucker |
| Abstract Scope |
Nanocrystalline (NC) materials attract significant interest in terms of potential engineering applications and building behavioral understanding. The addition of specific solutes has been predicted and experimentally shown to provide stability again grain growth at elevated temperatures; dictated by enthalpies of mixing and segregation of NC alloys. However, the vast majority of existing studies assume only thermal annealing conditions; however, under thermomechanical (TM) loading, stresses and strains will alter the thermodynamic criteria for stability as well as the underlying mechanisms of deformation accommodation. In this study, stability of NC alloys under thermo-mechanical loads is investigated using experiments and atomistic simulations. A strongly segregating Ni (P) alloy system is chosen. The underlying mechanisms dictating the thermo-mechanical stability, as a function of alloy grain size and solute content, are studied. The dependence of GB structure on solute segregation and its role in deformation accommodation is also discussed. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |