| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Neutron and X-ray Scattering in Materials Science and Engineering
|
| Presentation Title |
Operando X-ray and Neutron Diffraction and Imaging During Laser Powder Bed Fusion |
| Author(s) |
Steven Van Petegem |
| On-Site Speaker (Planned) |
Steven Van Petegem |
| Abstract Scope |
Operando X-ray Diffraction during Laser-Based Powder Bed Fusion
Laser powder bed fusion (L-PBF) is an additive manufacturing technique where parts are constructed layer-by-layer by adding precursor powder layers and selectively scanning them with a high-power laser, resulting in the densification of successive slices of a three-dimensional object. During L-PBF, heating and cooling rates can reach up to 10 million degrees per second, creating far-from-equilibrium microstructures, high residual stresses, and various defects that impair the thermo-mechanical reliability of the printed components. To investigate these challenges, we have developed several specialized miniaturized L-PBF devices optimized for use at synchrotron and neutron facilities. We demonstrate the capabilities of these devices through various in-situ X-ray and neutron diffraction and imaging experiments, which allow tracking the evolution of the microstructure during LPBF with high temporal and spatial resolution. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Solidification |