| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Microstructure, Defects, and Properties
|
| Presentation Title |
EB-PBF of Pure Tungsten Components for High-Temperature Application: From Fabrication to Evaluation |
| Author(s) |
Haozhi Zhang, Paul Carriere, Matthew Baldwin, Tim Horn |
| On-Site Speaker (Planned) |
Haozhi Zhang |
| Abstract Scope |
Tungsten has garnered significant interest in the fusion field, but the broader application faces notable hurdles due to its low room-temperature ductility and susceptibility to cracking. Electron beam powder bed fusion (EB-PBF) offers a promising avenue for crafting pure tungsten components, leveraging its high thermal energy input, elevated build temperatures, and controlled vacuum environment. In this study, the fully dense structure with equiaxed grains along the build direction is realized by optimizing print setups and parameters of EB-PBF. The ambient and elevated temperature properties are subsequently evaluated by standard flexural testing. The pre-defined and process-induced defects are further evaluated by harnessing various imaging techniques, including in-situ electron emission and NIR imaging, post-build X-ray computed tomography (CT), and conventional metallography. In addition, the plasma-material-interaction (PMI) of AM pure tungsten is assessed by exposing the material to various fluence and temperature conditions under the linear plasma source. |