| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Understanding the Elevated Temperature Properties of Niobium-Based Alloys Relevant to Aerospace Applications |
| Author(s) |
Lauren Bowling, Noah Philips, Daniel Matejczyk, James Fitz-Gerald, William Riffe, Patrick Hopkins, Sean R. Agnew |
| On-Site Speaker (Planned) |
Sean R. Agnew |
| Abstract Scope |
A review of the high-temperature constitutive responses of Nb-alloys measured over a wide range of temperatures (≈860°C < T < ≈1760°C) and strain rates (≈10-9 s-1< ε ̇ < ≈10-1 s-1) reveals the extant data is sparse and informed materials selection decisions require constitutive expressions, and a minimum flow stress approach based on the combination of two classical models is proposed. The fact that refractory alloys exhibit strain rate sensitive flow strengths is highlighted as are the roles of alloying, thermomechanical processing, and impurity levels. These alloys generally evidence Class 1 (Class A) solute drag controlled creep behavior, and the high-temperature strengths are strongly correlated with alloy melting point. Other thermophysical property data are also aggregated to inform materials selection. The results highlight some critical uncertainties and gaps in existing experimental data, the relative value of current alloy C103, as well as the promise of specific Nb-W-Zr alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
ICME, Mechanical Properties, Modeling and Simulation |