| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Designing Complex Microstructures through Additive Manufacturing
|
| Presentation Title |
Process Optimization Towards Single Crystal Superalloy Parts in Laser Powder Bed Fusion |
| Author(s) |
Michael Paleos, Albert To, Yuichiro Koizumi, Masayuki Okugawa |
| On-Site Speaker (Planned) |
Michael Paleos |
| Abstract Scope |
Single crystal (SX) nickel-based superalloys are fabricated to satisfy the high-temperature property requirements for aerospace applications. Beyond conventional fabrication, the laser powder bed fusion (LPBF) process facilitates the location-specific and anisotropic microstructure control, combining the superior properties of SX parts with complex geometries and reduced manufacturing times. This study focuses on uncovering the effects of the main process parameters and different rotational scan strategies on melt pool and overlap region geometries and, thus, on the grain structure in terms of SX quality. Our approach is based on an integrated computational framework indirectly linking thermal process and microstructure evolution models to improve time efficiency. More specifically, the matrix-free FEM-based PAMSIM process simulator is employed to capture critical thermal signatures, while the cellular automata-based ExaCA open-source software is used to approximate the final grain structure. Ultimately, the insights gained will be applied to fabricate near-SX nickel-based superalloy LPBF components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Solidification, ICME |