About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
Tuning Mechanical Metastability in FeMnCo Medium Entropy Alloys |
Author(s) |
S.L. Wei, M. Xu, James M. LeBeau, C. Cem Tasan |
On-Site Speaker (Planned) |
C. Cem Tasan |
Abstract Scope |
In this talk, the compositional dependency of face-centered cubic (FCC) to hexagonal close-packed (HCP) martensitic transformation in FeMnCo medium entropy alloys (MEAs) will be reported, and insights into the underlying transformation mechanisms will be discussed. To this end, the designed MEAs with the same Fe-to-Mn ratio and their phase stability will be presented. The investigations demonstrate that higher Co contents facilitate the FCC-HCP transformation kinetics. In situ electron backscatter diffraction (EBSD) studies reveal an FCC-HCP-(new)FCC transformation chain and its underlying atomistic mechanisms are directly explored via aberration-corrected scanning transmission electron microscopy. |