| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Forming Bulk Al Metallic Glass Using Laser Powder Bed Fusion |
| Author(s) |
Alice E. Perrin, Jon Poplawsky, Kinga Unocic, Patxi Fernandez-Zelaia, Alex Plotkowski, Ying Yang |
| On-Site Speaker (Planned) |
Alice E. Perrin |
| Abstract Scope |
The thermodynamic limitations and low glass transition temperatures of aluminum based metallic glasses makes producing bulk Al metallic glass (BMG) notoriously difficult. Cast specimens of two known Al-based metallic glass forming systems, Al-14.9Ni-19.6La (wt%) and Al-11.72Ni-3.92Co-8.55Y-7.19La (wt%), were processed with a laser powder bed fusion system to create single line weld tracks of different velocities and powers across the surface, simulating additive manufacturing (AM) conditions. SEM, EBSD and APT were used to characterize weld tracks and observe the degree to which the rapid solidification experienced in AM induces metallic glass formation in these systems. APT and TEM analysis was used to characterize the nanoscale Ni clusters observed in both systems as well as surrounding matrix material through compositional analysis and diffraction patterns. The area fraction of amorphous MG produced in the as-welded state was estimated, and in-situ TEM heating was used to directly understand crystallization of the amorphous regions |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Characterization, Additive Manufacturing |