| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Phase Transformation of an Additively Manufactured Martensitic Steel |
| Author(s) |
Fan Zhang, Greta Lindwall |
| On-Site Speaker (Planned) |
Fan Zhang |
| Abstract Scope |
As additive manufacturing (AM) technology matures, the pressing need to understand phase transformations in AM materials becomes increasingly crucial for AM alloy design, optimization, and process qualification. In this study, we investigated an AM martensitic steel's complex phase transformation behaviors. We leveraged the powerful capabilities of in situ measurements available at high-energy synchrotron X-ray sources, employing methods such as high-speed X-ray diffraction and combined small-angle and wide-angle X-ray scattering. These methodologies enabled us to quantify liquid-solid and solid-state phase transformations, revealing details including solidification, aging kinetics, and reverse austenitization in materials processing. The data gathered from these direct observations served as essential benchmarks for comparison with simulation predictions informed by thermodynamic and kinetic considerations. These findings underscore the role of in situ measurements in unraveling the complexities of phase transformations. While our focus is on AM steels, these insights have broader implications for understanding material transformations in AM alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Phase Transformations, Solidification |