| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-136: Phase Transformation Kinetic Pathway in Heat Treatment of Ti-6Al-4V Manufactured by Selective Laser Melting |
| Author(s) |
Dang Khoa Do, Peifeng Li |
| On-Site Speaker (Planned) |
Dang Khoa Do |
| Abstract Scope |
The Selective Laser Melted Ti-6Al-4V consists of an acicular martensitic microstructure (’) in as-built conditions owning to fast cooling rate. In the post process, high temperature decomposes the ’ into + microstructure as final products. However, the kinetic pathways of the phase transformation is not well established and the intermediate path via the spinodal decomposition, ’ → (solute-rich) + (solute-lean) → + is often neglected in the literature. Therefore, we proposed the possible pathway by employing the thermodynamic graphical approach coupling with Phase Field modelling and experiment. The result has successfully explained the spinodal decomposition mechanism of the ’ into the Vanadium-rich and the Vanadium-lean and the association with annealing twins in the heat treatment of Selective Laser Melted Ti-6Al-4V |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |