| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-98: Correlating 3D Stress Distributions with Twin Nucleation and Growth Using PRISMS-Plasticity |
| Author(s) |
Michael Pilipchuk, Sangwon Lee, Chaitali Patil, John Allison, Ashley Bucsek, Veera Sundararaghavan |
| On-Site Speaker (Planned) |
Michael Pilipchuk |
| Abstract Scope |
A combined experimental and computational approach for understanding three-dimensional twin formation and growth in Magnesium alloy is presented. The three-dimensionally characterized experimental microstructure was modeled in tension in crystal plasticity finite element simulations. The simulation was performed with and without an explicitly measured twin to analyze the stresses at the twin nucleation sites and the backstresses. Simulations showed that triple junctions consistently had higher stresses than the parent grain. Furthermore, the locations of twin nucleation on the triple junctions showed elevated stresses relative to the remaining triple junctions. Then, the twin resolved shear stress (TRSS) was compared in models with and without the twin. With the twin, TRSS was found to drop significantly. Backstress, or the difference in TRSS before and after the twin forms, was found to be greatest near the grain boundary of the parent, providing a driving force for twin formation. |
| Proceedings Inclusion? |
Undecided |