About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
In-Situ Synchrotron Radiography of Bubble Dynamics in Tungsten During Laser Powder Bed Fusion |
| Author(s) |
Cesar Diaz-Caraveo, Zane Taylor, Lichao Fang, Tharun Reddy, Steven Van Petegem, William Hearn, Yunhui Chen, Alexander Rack, Adrian Lew, Leora Dresselhaus-Marais |
| On-Site Speaker (Planned) |
Cesar Diaz-Caraveo |
| Abstract Scope |
Laser powder bed fusion processing of tungsten presents an important opportunity for net-shape parts in thermomechanical applications because it retains its strength to the highest temperatures of any metal. However, oxidation and defects cause significant cracking in additively manufactured parts, limiting its viability in technology. The formation of pores at multiple length scales has been reported extensively in literature, but much is unknown about the dynamics of this before solidification. Here we report our in-situ X-ray radiography at the synchrotron of complex bubble dynamics in single-track experiments performed on tungsten substrates. We observe and track bubbles in multiple regions of the melt pool and discuss how those dynamics determine the solidified structure. Our study demonstrates the first in-situ bubble dynamics observation in tungsten, a phenomenon with great relevance for the performance of LPBF tungsten processed parts and their future applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Other |