|About this Abstract
||MS&T22: Materials Science & Technology
||High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond III
||Microstructural Characterization and Oxidation Resistance in Multi FCC Principal Element Alloys
||Mckenna Mae Lin Hitter, Shailendra K. Varma
|On-Site Speaker (Planned)
||Mckenna Mae Lin Hitter
Multi FCC principal element alloys have been created using equiatomic Al-Cu-Ni-Mn (RB=12) and Al-Cu-Ni-Mn-Si (RB=74)systems. Microstructural characterization in both as received and oxidized conditions has been carried out. We have the evidence of four microconstituents present that are rich in : (a) Mn , (b) Ni and (c) Al-Cu-Ni in quaternary and Al-Cu-Mn in quinary alloys, and (d) eutectic. Incorporation of Si results in the formation of an additional microconstituent in the form eutectic. The alloys were subjected to oxidation in air at 600, 700, and 800oC for 24 hours. Excellent oxidation resistance up to 800oC has been observed for this alloy. The oxide scales and changes in the microstructures evolved during oxidation have been delineated using back-scattered electron mode in an SEM, EDS, XRD, and color x-ray mapping.