About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bridging Scales: Deformation and Damage Mechanisms in Microstructurally and Compositionally Complex Metallic Alloys
|
| Presentation Title |
Leveraging the strain glass microstructure in fcc chemically complex alloys |
| Author(s) |
Annie Barnett, Daniel Foley, Emily Hopkins Mang, Wei-Ying Chen, Michael Falk, Mitra L. Taheri |
| On-Site Speaker (Planned) |
Annie Barnett |
| Abstract Scope |
Face centered cubic chemically complex alloys (FCC CCAs) are gaining attention as promising alternatives to conventional steels due to escalating demands for advanced structural materials. While ferritic–martensitic (FM) steels have long been favored for their economic alloying, excellent thermal conductivity, good oxidation resistance, and reliable creep strength at moderate temperatures, their performance is facing limitations. The concentrated chemistries in FCC CCAs lead to highly distorted lattice environments that pose challenges for nanoscale characterization. Our study reveals that the presence of multiple principal elements can suppress long-range martensitic transformations, contrasting with the deformation mechanisms seen in FM steels. We employ in situ ion irradiation and cryogenic quenching within a transmission electron microscope to initiate stress-induced nanoscale phase transformations. High-resolution structural data is achieved by integrating 4D scanning transmission electron microscopy (4D-STEM) with precession electron diffraction (PED), enabling the development of complex microstructures with enhanced magnetic and mechanical properties. |
| Proceedings Inclusion? |
Planned: |