| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Understanding High Entropy Materials via Data Science and Computational Approaches
|
| Presentation Title |
Utilizing Atomistic Calculations for Processing High-Value Magnetic Material Derived from FeNiMoW |
| Author(s) |
Sarah E. O'Brien, Matthew Beck |
| On-Site Speaker (Planned) |
Sarah E. O'Brien |
| Abstract Scope |
Complex Concentrated Alloys (CCAs) have both complex compositions and complex processing-structure-property relationships. Recent studies of near equiatomic FeNiMoW observe the formation of an FCC phase containing equal amounts of Fe and Ni. While some evidence indicates that FCC phase is a random solid solution, DFT-based calculations accounting for enthalpy and entropy suggest that a semi-ordered phase related to tetrataenite—an L1<sub>0</sub> FeNi mineral phase primarily found in meteorites—is more stable than the solid solution phase, even to relative high temperatures. Tetrataenite has been reported to exhibit desirable magnetic properties, potentially rivaling those of rare earth alloys, but it is extremely difficult to fabricate. The results suggest the possibility to optimize a lower-cost synthesis and processing parameters for FeNiMoW alloys to yield high-value magnetic materials. Here we explore the phase stability of FeNiMoW alloys and derivatives, with specific attention to potential processing approaches for fabricating ordered or semi-ordered FeNiMoW. |