| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Heterostructured and Gradient Materials (HGM VI): Principle, Processing and Properties
|
| Presentation Title |
Probing the Evolution of Dislocation Structures in Heterogeneous Lamellar Metals via Discrete Dislocation Dynamics Simulations |
| Author(s) |
Caizhi Zhou |
| On-Site Speaker (Planned) |
Caizhi Zhou |
| Abstract Scope |
Heterogeneous lamella (HL) structured metals possess an unprecedented property combination: as strong as nano/ultrafine grained metal and at the same time as ductile as coarse-grained metals. Partly because more than one material and structural length scales are involved in these materials. The intrinsic deformation physics in HL metals is not fully understood. In this work, we perform 3D discrete dislocation dynamics (DDD) simulations to analyze the collective dynamic dislocation behavior in HL metals. In this model, interfaces between different domains will be treated as impenetrable or transparent for dislocations to explore the effect of interface on the dislocation density evolution and strain hardening in the HL metals. In addition, kinematic and equilibrium equations will be solved in this model to consider the boundary constraint between the soft and hard lamellae. Our simulation results will rationalize the correlations between the microstructure length-scales and the strain hardening behavior of HL metals. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Thin Films and Interfaces |