| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation and Transitions at Grain Boundaries VII
|
| Presentation Title |
Interrelationship Between How Grain Boundary Solute Segregation Influence Grain Coarsening, Initiation of Phase Transformations, and Impact Deformation Mechanisms of Metallic Alloys |
| Author(s) |
Arun Devaraj, Libor Kovarik, Elizabeth Kautz, Bharat Gwalani, Aashish Rohatgi, Wenbo Wang, Jason Trelewicz, Vineet Joshi, Curt Lavender |
| On-Site Speaker (Planned) |
Arun Devaraj |
| Abstract Scope |
The fundamental mechanistic influence of solute segregation on the mobility of grain boundaries during thermal annealing, as well as during deformation, is a topic of great interest both in fundamental and applied physical metallurgy domains. Another closely related topic is how solute segregation and precipitation of secondary phases at grain boundaries can be manipulated to control the extent and kinetics of phase transformations initiating at grain boundaries. The main aim of this talk is to highlight the interrelationship between these seemingly different topics. We will present how the relative influence of thermodynamic stabilization of grain boundaries by solute segregation or kinetic pinning by precipitation, would influence several phenomena in various metallic systems, including: thermal coarsening of light weight nanocrystalline Al-Mg alloys; modification of phase transformation kinetics of grain boundary initiated discontinuous precipitation in UMo alloys; and influences on the shear deformation mechanism of model metallic alloys (e.g. Al-Mg and Al-Si). |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |