| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation
|
| Presentation Title |
Effect of Machining Processes on the Perceived Mechanical Properties of Tantalum Refractory Alloys |
| Author(s) |
Christopher Barret Finfrock, Zahra Ghanbari, Rachel White, Charles Robino, Christina Profazi, Jay Carroll, Stephen Spiak, Bonnie Antoun |
| On-Site Speaker (Planned) |
Christopher Barret Finfrock |
| Abstract Scope |
Tantalum alloys are used extensively in high-temperature structural components. In such high-temperature operating conditions, it is understood that Ta-W alloys can be susceptible to oxidation-induced embrittlement, which can cause a nil-ductility condition despite their notionally high-toughness. The response of these alloys to machining is unclear, because machining processes may influence the composition and structure of the surface. For instance, it is hypothesized that wire EDM could introduce oxygen or hydrogen, while conventional milling could increase the local dislocation density. In this study, surface and bulk micro-mechanical tests are complimented by a suite of characterization tools to explore the effect of machining processes on the structure and mechanical performance of Ta-10W and Ta-8W-2Hf (T-111) alloys. The results presented here have important implications for accurately measuring the material properties used as inputs for mechanical models of high-temperature structural components.
Sandia-National-Laboratories-is-a-multimission-laboratory-managed-and-operated-by-National-Technology-and-Engineering-Solutions-of-Sandia,-LLC.,-a-wholly-owned-subsidiary-of-Honeywell-International,-Inc.,-for-the-U.S.-Department-of Energy’s-National-Nuclear-Security-Administration-under-contract-DE-NA0003525. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, Other |