| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Twin Network Formation and Morphology in Metals with Hexagonal Close Packed Crystal Structure |
| Author(s) |
Laurent Capolungo, Dang Khanh, Arul Kumar, Darshan Bamney, Hi Vo, Rodney McCabe, Carlos Tome |
| On-Site Speaker (Planned) |
Laurent Capolungo |
| Abstract Scope |
Plasticity in metals with the hexagonal close packed crystal (hcp) structure can be simultaneously mediated by the activation of slip and twinning. The role of twinning on the plastic response of hcp metals likely correlates with the kinetics and mechanisms of formation of twin networks. Using atomistic simulations, phase field modeling, and a novel tool, METIS-3D - allowing for the reconstruction of three-dimensional (3D) twinned volumes from the use of serial 3D ESBD, we studied the unit processes (i.e., twin transmission across grain boundaries) leading to the formation of complex twin networks. The study demonstrates that inter and intra-granular stresses determine the outcome of twin/grain boundary interactions. In contrast, geometrical requirements (i.e., alignment between incoming and outgoing twins) do not significantly constrain the transmission process. Altogether, these mechanisms translate into complex and tortuous twin networks that as revealed and analyzed in 3D for the first time in Ti. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Titanium |