| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Phase Transformations during Laser-based Powder Bed Fusion Studied by Operando X-ray Diffraction |
| Author(s) |
Steven Van Petegem |
| On-Site Speaker (Planned) |
Steven Van Petegem |
| Abstract Scope |
Laser powder bed fusion (L-PBF) is a “layer-by-layer” additive manufacturing process, in which parts are built up by adding precursor powder layers and selectively scanning them with a high-power laser, resulting in the densification of consecutive slices of a three-dimensional object. During L-PBF, heating and cooling rates up to 10 million degrees per second have been reported, leading to far-from-equilibrium microstructures. Additionally, the thermal history of a printed component can be very complex, because each material point melts and/or heats up to high temperatures during printing successive layers. To study the evolution of the crystallographic phases during L-PBF, we have developed a dedicated miniaturized L-PBF device optimized for installation at synchrotron X-ray diffraction and imaging beamlines. In this presentation, I will demonstrate how this device was used to study the microstructure evolution in Ti and Fe-based alloys with time resolutions down to 25µs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Additive Manufacturing, Solidification |