|About this Abstract
||MS&T22: Materials Science & Technology
||High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond III
||E-10: Characterization of Microstructure and Properties of Al2FeCoNiCu High-entropy Alloy
||Lucy F Hunter, Matthew Kestenbaum, Juan C Palominos, Ryan Z Thompson, Mohsen B. Kivy
|On-Site Speaker (Planned)
||Ryan Z Thompson
In this study, the microstructure and properties of Al2FeCoNiCu high-entropy alloy (HEA) were investigated. The HEA was cast using an induction furnace and homogenized at 550oC. X-ray fluorescence (XRF) was used to confirm the composition of the alloy. A phase diagram that was calculated using Thermo-Calc with the TCHEA5 database showed two bcc phases and one fcc phase stabilized at room temperature. The presence of these phases was confirmed using X-ray diffraction (XRD). Optical micrographs of as-cast and homogenized samples revealed a dendritic (DR) and an inter-dendritic (ID) regions within the microstructure. Energy dispersive spectroscopy (EDS) determined that the ID regions were copper-rich while the DR regions had near equi-atomic composition. The HRC and HV showed overall high hardness with a slightly higher hardness value for the homogenized samples compared to the as-cast. Corrosion testing was performed in a 0.5M salt bath to observe corrosion rates within each region.