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 a suite of refractory alloys (e.g., W-Re, Ta-W, C103) and characterize their mechanical behavior to understand the processing-structure-property relationships. 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. In addition to room temperature mechanical properties, a study to measure the high-temperature (up to 2000°C) tensile properties at mm-cm length scales is ongoing and the results will be discussed. |