About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
|
Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
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| Presentation Title |
Fundamentals of Creep Mechanisms in GRX 810 ODS versus Non-ODS AM Alloys Across Low to High Strain Rate Regimes |
| Author(s) |
Naveen Dinujaya, Andrew Koenig, Jesse Leyva Zavala, Jacob M Wilson, Suhas Esawarappa Prameela |
| On-Site Speaker (Planned) |
Naveen Dinujaya |
| Abstract Scope |
The complexity of metallic alloy design is increasing to meet the demands of extreme temperatures and stressful environments. Advanced Ni-based oxide dispersion-strengthened (ODS) alloys, with low stacking fault energy and a high density of stable oxide particles, are promising for creep-resistant high-temperature applications. This study uses a high-throughput framework combining nanoindentation and laser-induced particle impact testing (LIPIT) to examine the temperature- and strain-rate–dependent deformation of GRX-810, comparing ODS and non-ODS additively manufactured variants. We perform nanoindentation under varying loads and low strain rates to extract strain rate sensitivity parameters. LIPIT probes the deformation mechanisms at ultrahigh strain rates and elevated temperatures. We identify a crossover in dominant creep and plasticity mechanisms across strain rate regimes and correlate it with microstructural features revealed by electron microscopy. This integrated approach enables us to map rates rapidly and temperature-dependent mechanical responses, accelerating the development of Ni-based ODS alloys for extreme environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, Other |