| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
The Anisotropy of Deformation Twinning in bcc Materials Mechanical Loading, Temperature Effect, and Twin–Twin Interaction |
| Author(s) |
Mehrab Lotfpour, Lei Cao, Amir Hassan Zahiri, Jamie Ombogo |
| On-Site Speaker (Planned) |
Mehrab Lotfpour |
| Abstract Scope |
In this study, we combine atomistic simulations and theoretical calculations to explore the prevalence of {112} deformation twins in bcc materials, focusing on their sensitivity to loading direction and temperature. Our simulations demonstrate the occurrences of {112} twins involving either hcp or fcc intermediate phases. Specifically, hcp phases emerge in bcc titanium alloy under [100] compression, while fcc phases appear during tension. Similarly, these phases are observed in bcc iron under varying temperature conditions. We also identify the fcc and hcp cases as the normal deformation twin mode and the 1/2 atom-shuffle mode, respectively, by calculating the correspondence matrix. These twinning modes significantly impact twin-twin interactions and the resulting microstructure. Our theoretical calculations confirm that the selection of specific twin modes and variants is influenced by the correlation between their deformation path and mechanical loading. |
| Proceedings Inclusion? |
Planned: |