About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
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| Presentation Title |
Thermally Driven Non-Equilibrium Phase Formation Effect on Mechanical and Corrosion Behavior of Wire-Arc Directed Energy Deposited FeCr-Based High Entropy Alloy |
| Author(s) |
Blanca D. Palacios, Tanaji Paul, Tyler Dolmetsch, Arvind Agarwal |
| On-Site Speaker (Planned) |
Blanca D. Palacios |
| Abstract Scope |
High-entropy alloys (HEAs) exhibit exceptional strength, high-temperature stability, corrosion resistance, and wear performance, making them promising candidates for defense applications. However, their complex multicomponent nature challenges phase formation predictions, especially under non-equilibrium conditions in additive manufacturing processes such as Wire-Arc Directed Energy Deposition (WDED). This study evaluates the layerwise phase evolution and mechanical/corrosion performance of a FeCr-based MXC140 HEA nanocomposite wire fabricated via WDED. X-ray diffraction and microstructural analysis revealed the formation of martensite and carbides phases (NbC, WCx, Fe₄C), driven by cyclic reheating. A gradual increase and inhomogeneous distribution of carbides, 5–10% NiC and 7–12% WCx, along the buildup reflect precipitation kinetics governed by local temperature gradients and reduced solubility. Microhardness gradually increased from 1050 to 1260 HV, correlating with carbide-rich regions. These heterogeneities influenced the electrochemical behavior across the buildup. Current findings enhance understanding of thermodynamics in WDED HEAs further unlocking the design of critical components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Characterization |