| About this Abstract |
| Meeting |
2024 AWS Professional Program
|
| Symposium
|
2024 AWS Professional Program
|
| Presentation Title |
Ultra-high Temperature Mechanical Testing Methodology for Additively Manufactured Refractory Alloys |
| Author(s) |
Kelly Orsborn, Kaue Riffel, Eric Brizes, Carly Romnes, Fernando Reyes Tirado, Antonio Ramirez |
| On-Site Speaker (Planned) |
Kaue Riffel |
| Abstract Scope |
Refractory alloys are well-suited for extreme temperature environments and have shown favorable mechanical properties in environments beyond the limits of conventional metals. However, these alloys were developed decades before additive manufacturing (AM) was commonly used. Due to their high cost and difficulty to machine, they have been receiving significant developments in AM for the capability to produce near-net shape parts with minimal waste. Because of this, a new testing methodology must be developed for evaluating printed refractory alloys to determine their fitness for service. In this research, a thermomechanical simulator (Gleeble) was modified and utilized for evaluating the mechanical performance of AM refractory alloys at a wide range of temperatures. Special grips and samples were designed (geometry and composition) considering the joule heating used by the thermomechanical simulator as well as to prevent damage within the testing chamber. Oxidation during the testing was controlled by using high vacuum at levels of 10-5 torr. This procedure enabled rapid and affordable mechanical testing of refractory alloys at extreme temperatures. C103, TZM, and Tungsten L-PBF samples were designed, printed, and tensile tested at temperatures up to 0.7Tm showing consistent repeatability. The considerations dictating the development of this new methodology are discussed, as well as recent findings, to demonstrate the significant deviations from traditional mechanical testing methods required to successfully account for these extreme conditions. |
| Proceedings Inclusion? |
Undecided |