| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
Mapping Nanoscale Origin of Superior Mechanical Performance of a W-Rich Alloy Processed by Laser Powder Bed Additive Manufacturing |
| Author(s) |
Abhijeet Dhal, Eric Kusterer, Amit Singh, Amit Arora, Prithvi Awasthi, Fredrick N. Michael, Rajiv Mishra |
| On-Site Speaker (Planned) |
Abhijeet Dhal |
| Abstract Scope |
A novel tungsten-niobium-carbon (W-Nb-C) refractory alloy was processed via laser-powder bed fusion (LPBF). Leveraging the dual advantages of eutectic solidification and a heterogeneous microstructure, this alloy demonstrates remarkable synergy between printability and enhanced mechanical performance. In this study, we employed high-resolution in-situ nanoindentation across a temperature range of 400-800°C to delineate phase-specific mechanical responses and map mechanical variation within a melt pool. This high-throughput approach provides crucial insights into the origins of the alloy’s enhanced performance. Our findings indicate that the formation of thermally stable W and Nb carbides during the LPBF process plays a pivotal role in achieving superior mechanical and refractory properties. Correlative microscopy and thermochemical analysis further elucidate the microstructural characteristics responsible for the alloy’s exceptional properties. This study not only advances the understanding of W-rich refractory alloys but also sets the stage for the development of next-generation refractory alloys optimized for LPBF. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Other, Other |