| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments III
|
| Presentation Title |
Fabrication of Nanocrystalline Microstructures Via Interplay Between Kinetics and Thermodynamics of Dynamic Recrystallization (DRX) |
| Author(s) |
Qiuming Wei |
| On-Site Speaker (Planned) |
Qiuming Wei |
| Abstract Scope |
Two factors govern recrystallization: thermodynamics and kinetics. If the temperature of a severely deformed metal is brought up for recrystallization, the great thermodynamic driving force produces a large number of strain-free new grains. If these tiny grains do not have the chance to grow, a nanocrystalline microstructure is retained. Then it is an open question whether the recrystallized metal will be softer than the severely deformed precursor. This is exactly the case in dynamic loading where adiabatic shear bands occur. Due to the strong quenching effect of the surroundings and the extremely short time, the tiny grains have no chance to grow significantly due to kinetics limitation, and the bands will exhibit UFG/NC grains. This has been widely observed in many reports. For pure metals, Hall-Petch strengthening can easily outplay strain hardening. As such, we envision the possibility of fabricating strong nanocrystalline microstructure via the interplay between thermodynamics and kinetics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Nanotechnology |