| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
|
| Presentation Title |
Unraveling the Mystery of Helium as Environment Gas in 3D Printing of Metals |
| Author(s) |
Zhongshu Ren, Tao Sun |
| On-Site Speaker (Planned) |
Tao Sun |
| Abstract Scope |
Helium has recently obtained growing attraction as an environment in laser-based metal 3D-printing technologies owing to its unique thermophysical properties and the potential improvement in printing processes. Nevertheless, much remain unclear regarding Helium’s effect on the phenomena during printing such as cooling, energy-coupling, and defect generation. With simultaneous high-speed synchrotron x-ray imaging and thermal imaging, we discovered that Helium has negligible effect on the cooling of the part. We also found that Helium can suppress unstable keyholes and therefore mitigate keyhole porosity generation and decrease porosity sizes in certain scanning conditions owing to decreased effective absorption energy. Those discoveries hold promise for optimal utilization of Helium gas in the 3D-printing processes of metals for better quality parts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Solidification, Other |