| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Knowledge-Processing-Microstructure of Pure Fe Produced by Laser Powder Bed Fusion |
| Author(s) |
Ethan Freed, Thinh Huynh, Yongho Sohn |
| On-Site Speaker (Planned) |
Ethan Freed |
| Abstract Scope |
Gas-atomized pure iron (Fe) powders were used as feedstock in laser powder bed fusion (LPBF). Processing optimization was performed as a function of laser power and scan speed. Density greater than 99% was obtained using a 200 W and 800 mm/s combination. The as-fabricated LPBF specimens were characterized by massive and equiaxed α-ferrite grains regardless of the energy density employed. Cooling rate was estimated as a function of scan speeds yielding insights into the size of the cellular structure, while melt pool dimensions were compared to approximations made utilizing the modified Rosenthal equation. Optical and electron microscopy was employed for microstructural analysis, which supported theoretical calculations of the microstructural features in additively manufactured pure Fe. While our focus is on additive manufacturing of pure Fe, insights provided here have broader implications for understanding the effects of cooling rate and laser-material interaction on melt pool development in alloys produced by LPBF. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Solidification |