| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Elucidating the Porosity-Cracking Tradeoff in Laser-based
Additive Manufacturing of Refractory Metals |
| Author(s) |
Gianna M. Valentino, Robert Mueller, Alex Lark, Li Ma, Ian McCue |
| On-Site Speaker (Planned) |
Gianna M. Valentino |
| Abstract Scope |
Advances in additive manufacturing (AM) promise to be a game-changer in the fabrication and implementation of refractory-based components via near-net-shape processing. However, the high melting temperatures of refractories necessitate the redevelopment of AM processing parameters compared to traditional AM metals (e.g., superalloys, steels). In this study, we develop AM laser parameters for tungsten and tantalum alloys and characterize their mechanical behavior to understand the processing-structure-property relationships. Computational fluid dynamics simulations are used to inform a subset of AM laser parameters that are manufactured and characterized for porosity and underlying microstructure. While low porosity is typically a key metric for success in most AM processing, the results presented here will discuss the need to balance maximizing bulk material density while also minimizing cracking from steep thermal gradients. Although still in its infancy, a study to fabricate refractory graded materials is ongoing and the results will be discussed for thermal management. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |