About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Slip System Activity and GNDs in CP‑Ti Sheets Stretched to Post Necking Regimes Via Cyclic Bending Under Tension |
| Author(s) |
Talukder Musfika Tasnim Oishi, Brigham Stacey, Tyson Neville, David Fullwood, Marko Knezevic |
| On-Site Speaker (Planned) |
Talukder Musfika Tasnim Oishi |
| Abstract Scope |
Interpreting dislocation behavior and slip system activities is necessary for understanding origins of enhancements in elongation of hexagonal close-packed (HCP) metals such as commercially pure titanium (CP-Ti) achieved via cyclic bending under tension (CBT). This study measures and predicts the evolution of geometrically necessary dislocations (GNDs) and slip system activities during CBT, a loading path that introduces through-thickness gradients and cyclic asymmetry. Simulations are performed using an elasto-plastic self-consistent (EPSC) model implemented as a UMAT in ABAQUS. Informed by crystallographic texture, the model resolves orientation-dependent slip behavior and dislocation evolution over an extended sequence of tension-bending reversals. The results reveal distinct responses across grain orientations, with certain slip systems engaging preferentially. GNDs progressively accumulate in response to repeated slip reversals and local differences in deformation behavior between grains, illustrating how crystal orientation influences dislocation structures. This work provides insights into microstructure-sensitive plasticity of HCP metals stretched to post-necking regimes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Characterization, Mechanical Properties |