| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales IV
|
| Presentation Title |
Interactions between Defects and Omega Phase in Ti via Molecular Dynamics and Phase Field Simulations |
| Author(s) |
Khanh Dang, Darshan Bamney, Carlos Tomé, Laurent Capolungo |
| On-Site Speaker (Planned) |
Khanh Dang |
| Abstract Scope |
Under extreme conditions, alpha-Ti becomes unstable and transforms into beta-Ti (at high temperature) or omega-Ti (at high pressure). For the alpha to omega phase transformation, there has been a wide range of experimentally reported transition pressures from approximately 2 to 15 GPa at room temperature. Defects are often considered as the cause for this variation. In this study, we investigate the interactions between {101'2}! twins and
dislocations and an omega phase nucleus to understand the effect of these interactions on the alpha to omega phase transformation in Ti. This is done via a combined approach of continuum mechanics, molecular dynamics, and phase field simulations, which allows us to gain a comprehensive understanding of the interactions across different length scales. Overall, we found that these interactions reduce the critical size of the w nucleus required to promote the alpha to omega phase transformation in Ti. |