| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Melt Pool Geometry and Defect Susceptibility in Laser Powder Bed Fusion of Single Phase Refractory Alloys |
| Author(s) |
Kaitlyn M. Mullin, Carolina Frey, James Lamb, Chris J. Torbet, McLean P. Echlin, Tresa M. Pollock |
| On-Site Speaker (Planned) |
Kaitlyn M. Mullin |
| Abstract Scope |
Refractory alloys remain difficult to fabricate by laser-based additive manufacturing (AM) techniques due to their high melting temperatures, brittle nature, and high interstitial solubility. Many practical features dictating the processing-microstructure-property relationships of AM refractory alloys remain unknown, including printing strategies to minimize defects and solidification cracking susceptibility in single phase refractory alloys. To investigate the printability of this alloy class, a selection of single phase refractory substrates, including niobium-based alloy C103 and multi-principal element refractory alloys, are exposed to single laser tracks across a wide range of energy inputs. Changes in melt pool geometry, solidification morphology, and crack susceptibility with respect to composition and energy inputs are identified. The implications for suitable compositions and processing strategies for AM of refractory alloys will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Solidification |