| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Nanoscale Shuffle Transformation in a Multifunctional Ti-Nb-Zr-Ta Alloy |
| Author(s) |
Dian Li, Deepak Pillai, Yufeng Zheng |
| On-Site Speaker (Planned) |
Yufeng Zheng |
| Abstract Scope |
Shuffle transformation is a distinct class of displacive transformation, accomplished by the rearrangement of atom positions within the unit cell, with little or no pure strain of the lattice. In titanium alloys, body-centered cubic (bcc) beta phase to hexagonal omega phase transformation is a prototype shuffle transformation, in which every two of three adjacent {111} planes shuffle towards to the intermediate plane of the two leaving the third plane unaltered. In this work, we report another nanoscale shuffle transformation in a multifunctional Ti-Nb-Zr-Ta alloy, the bcc beta phase to orthorhombic O’ phase transformation. The structure of O’ phase was directly characterized using diffraction contrast TEM and z-contrast aberration-corrected S/TEM. The orthorhombic structure is generated by the shuffle of every other {110} planes of bcc lattice along the <1-10> directions. This work is supported by the National Science Foundation, grant DMR-2145844. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Characterization, Titanium |