About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification Methods for Nuclear Reactor Structural Materials
|
| Presentation Title |
Using Stress Relaxation Testing to Accelerate the Evaluation of the Long-Term Creep Performance of Alloy GRX-810 |
| Author(s) |
Daniel McConville, Timothy Smith, Jonah Klemm-Toole |
| On-Site Speaker (Planned) |
Daniel McConville |
| Abstract Scope |
Despite the potential of new alloy systems with promising high-temperature mechanical properties, extensive experimental validation often slows adoption. GRX-810, an additively manufactured, oxide dispersion strengthened, NiCoCr-based alloy, has exhibited excellent creep performance at extreme temperatures. To further understand the creep performance of GRX-810, longer term testing is necessary. In this work, we leverage stress relaxation testing at 760 °C and 850 °C to evaluate a wide range of creep rates, including lower than 10-9 s-1, in a 100 hour test. The results indicate threshold creep behavior as well as the transition from power law to diffusional creep at lower stresses, highlighting the benefits of using stress relaxation testing as an accelerated method to evaluate creep behavior in new, high-temperature materials made with additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, |