| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Alpha-Omega Phase Transformations and Microstructural Evolution in Shocked HCP Metals |
| Author(s) |
Benjamin M. Morrow, David R. Jones, Ellen K. Cerreta |
| On-Site Speaker (Planned) |
Benjamin M. Morrow |
| Abstract Scope |
During shock loading, hcp metals (e.g. zirconium and titanium) can experience a phase transformation from hcp alpha phase to hexagonal omega phase. Omega phase is often retained in the microstructure after unloading, and has a strong influence on subsequent mechanical properties. A systematic study of the microstructural evolution under various shock conditions will be presented. Soft-recovered shocked samples were characterized using electron backscatter diffraction (EBSD) to observe and quantify crystal orientations and microstructural features (including twinning, phase variants formed during deformation, and textures) to determine likely transformation pathways. The kinetics of the phase transformation is also of interest, and in-situ experiments at the Advanced Photon Source, and shear experiments at LANL provide insight to the evolution during transformation. The combination of high-rate, in-situ and post-mortem data allow us to probe the mechanism and kinetics of phase transformations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Titanium, |