| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
|
| Presentation Title |
Revealing Short-Range Order in Refractory Multiprincipal Element Alloy: Implications for Oxidation Resistance |
| Author(s) |
Elaf A. Anber, Brian DeCost, Yevgeny Rakita, Nathan Smith, David Beaudry, Georgia Leigh, Howie Joress, Michael Waters, Ben Redemann, Loic Perriere, James Rondinelli, Simon J.L. Billinge, Tyrel McQueen, Chris Wolverton, Jean Phillippe Couzinie, Mitra Taheri |
| On-Site Speaker (Planned) |
Elaf A. Anber |
| Abstract Scope |
TiNbZr-based alloys are recognized for their high strength at elevated temperatures,making them ideal for aerospace applications, such as jet engines and spacecraft. Despite their single-phase body-centered cubic (BCC) structure,these alloys exhibit a local chemical order that enhances their properties.Understanding the stability and persistence of short-range order (SRO) at operational temperatures in TiNbZr is crucial for optimizing alloy characteristics like oxidation resistance and phase stability. In this work, we employed Extended X-ray Absorption Fine Structure (EXAFS) and X-ray total scattering experiments (xPDF),supported by atomic simulations, to investigate SRO. Initial measurements using lab-scale X-ray PDF helped correlate SRO with theoretical predictions based on processing conditions,including oxygen content. Bond lengths extracted from xPDF data were incorporated into the EXAFS fitting model.Our results demonstrate that SRO persists at elevated temperatures, with both first and second nearest-neighbor ordering maintained. This research aims to uncover fundamental principles of atomic-scale behavior, advancing the design of high-temperature alloys |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Entropy Alloys, High-Temperature Materials |