Characterization of Refractory High Entropy Alloys Powders Strengthened by Al2O3 and Y2O3 Nanoparticles

This dataset contains experimental characterization data of refractory high entropy alloy (RHEA) powders obtained by cryomilling and strengthened with different amounts of Al2O3 and Y2O3 nanoparticles. Samples were prepared using arc melting followed by cryomilling to produce fine refractory high entropy alloy (HEA) powders. The studies were conducted on HEA powders W35Ta35V20Cr5Hf5 (at.%) reinforced with 1%, 2%, and 3% by weight of Al2O3 and Y2O3 nanoparticles. After milling, selected powders were annealed under vacuum conditions at various temperatures (300 °C, 500 °C, 700 °C, 900 °C) to study thermal stability and microstructural evolution. The dataset includes characterization data obtained by the following techniques: Positron Annihilation Lifetime Spectroscopy (PALS) – for vacancy-type defect analysis, Doppler Broadening Spectroscopy (DBS) – to investigate electron momentum distribution, Scanning Electron Microscopy with EDX analysis (SEM-EDX) – for microstructural imaging and compositional mapping, X-ray Diffraction (XRD) – for phase identification and crystal structure analysis.