|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Microstructures and Properties of AlCrFeMnV, AlCrFeTiV, and AlCrMnTiV High-entropy Alloys
||Keith E. Knipling, Patrick Callahan, David Beaudry
|On-Site Speaker (Planned)
||Keith E. Knipling
A series of high-entropy alloys (HEAs) containing AlCrFeMnV, AlCrFeTiV, and AlCrMnTiV have been designed using a combination of thermodynamic prediction by Thermo-Calc and by experimental observation of the microstructure and phases present in arc-melted alloys. These alloys are predominantly BCC, with some alloys forming additional minor phases. A particularly intriguing microstructure is observed in the AlCrMnTiV alloy, which contains a high number density of ∼50 nm ordered B2 cuboids that are coherent with the BCC matrix, resembling the well-known γ-γ' microstructures in Ni-based superalloys but in a BCC system. We will correlate the alloy microstructures, observed using a combination of X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM/TEM), and atom-probe tomography (APT), to the alloys’ mechanical properties measured by Vickers microhardness and nanoindentation.
||Planned: Metallurgical and Materials Transactions