About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
|
| Presentation Title |
Effects of intra and inter-grain dislocation transport in high strain rate deformation of metals |
| Author(s) |
Vinamra Agrawal, Milovan Zecevic, Evan Lieberman, Kevin Larkin, Abigail Hunter, Darby Lusher |
| On-Site Speaker (Planned) |
Vinamra Agrawal |
| Abstract Scope |
Shock deformation of metals is accompanied by dislocation creation, transport, and interaction with grain boundaries (GBs). GBs impede dislocation motion leading to dislocation pile ups and increased back stress. As such GB morphology and texture play an important role in overall plastic deformation of metals and alloys.
In this work, we study high strain rate plastic deformation of rolled and annealed copper using an in-house hydrocode. We use a dislocation density-based crystal plasticity model, called DiscoFlux, to evolve mobile and immobile dislocation densities as a function of strain rate and temperature. We allow dislocation transport within grains using the computed dislocation velocity. Next, we introduce a geometric criterion for transport across GBs. This criterion computes an interaction matrix to determine compatibility of slip systems across GBs for dislocation transfer. We observe GB morphology and texture heavily influences dislocation transport and overall shock behavior of copper. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Copper / Nickel / Cobalt, Computational Materials Science & Engineering |