About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials, Processes and Applications for Energy Industry
|
| Presentation Title |
Laser Powder Bed Fusion Printing of Tungsten on G91 Steel for Fusion Reactor Applications |
| Author(s) |
Mahmud Hasan Ovi, Carly J. Romnes, Tamim Hossain, Intisher Al-Tahmid Omi, Hoon Lee, James F. Stubbins |
| On-Site Speaker (Planned) |
James F. Stubbins |
| Abstract Scope |
The development of robust plasma-facing components is essential for the viability of future fusion reactors, including ITER and DEMO. This study explores Laser Powder Bed Fusion (LPBF) printing of tungsten on G91 ferritic/martensitic steel to create a strong, thermally stable interface suitable for first-wall applications. By systematically varying processing parameters, we assess their influence on interfacial bonding, microstructural evolution, and mechanical performance. To evaluate the tungsten-G91 interface, a combination of tensile test, nanoindentation, and advanced microstructural characterization via SEM, EBSD, and TEM is conducted. Additionally, innovative interface strength measurement techniques along with digital image correlation (DIC) are employed to measure interface strength and assess local strain distribution during loading. These techniques provide localized mechanical insights critical for assessing defect formation and failure mechanisms under extreme conditions. These results pave the way for additive manufacturing of plasma-facing components in fusion environments, offering new pathways for material design and qualification. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Joining, Mechanical Properties |