| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phonons, Electrons and Dislons: Exploring the Relationships Between Plastic Deformation and Heat
|
| Presentation Title |
Thermo-mechanics of Large Deformation Shear Banding |
| Author(s) |
Curt A. Bronkhorst, Charles Lieou, Hashem Mourad, Veronica Anghel |
| On-Site Speaker (Planned) |
Curt A. Bronkhorst |
| Abstract Scope |
Shear banding is a form of ductile damage where the relationship between plastic work and material temperature is critical. We present a new physical model for the plastic deformation of metallic materials which accounts for softening due to increased dislocation mobility with heating and dynamic recrystallization. This model is based upon a new partitioned-energy thermodynamic framework which assigns the energy of cold work to atomic configurational stored energy and kinetic-vibrational energy. With specific energies assigned to dislocation line length and grain boundary area, second law considerations for any given loading condition lead to either increased plastic deformation by dislocation glide or the creation of new grain boundaries in recrystallized form. The theory is used to describe specific experiments performed on stainless steel alloys loaded dynamically. Computational results compared to experiments strongly suggest the prominence of dynamic recrystallization during adiabatic shear banding. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, ICME, Shaping and Forming |