| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Modeling of Phase Transformation Kinetics in Ti-6Al-4V Alloy during Additive Manufacturing |
| Author(s) |
Adrian Dante Boccardo, Xinyu Yang, Damien Tourret, Javier Segurado, Mingming Tong, Seán Leen |
| On-Site Speaker (Planned) |
Adrian Dante Boccardo |
| Abstract Scope |
Additive Manufacturing allows building metallic components of great topological complexity. However, the successive deposition and melting of material layers involves a convoluted thermal cycling with high heating and cooling rates, gradually decreasing as layers are added, which often results in multiple concurrent phase transformations. In this work, we study the phase transformations occurring in a Ti-6Al-4V alloy during fusion-based additive manufacturing (e.g. selective laser melting). These transformations include the transformation from a β phase into a metastable α’ martensite due to the rapid cooling after the layer deposition, followed by the α’ martensite decomposing (partially or totally) into an α+β structure during the cyclic temperature evolution. We combine different models (e.g. Avrami-based and phase-field) to simulate these solid-state transformations, paying special attention to the kinetics of martensite decomposition. Our simulation results are compared to experimental measurements to evaluate and discuss the accuracy, performance, and limitations of the models. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Titanium |