|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Multi-scale Characterization of Al0.3CrFeNiTi0.3 High-entropy Alloy Coatings Produced by High-velocity Oxygen-fuel (HVOF) Spraying
||Rasim Eris, Ashok Meghwal, Surinder Singh, Christopher C. Berndt, Andrew Siao Ming Ang, Paul Munroe
|On-Site Speaker (Planned)
Incorporating lighter elements, such as Al and Ti, into AlxCrFeNiTiy high-entropy alloys (HEAs) produced by bulk processing methods significantly enhances both strength and ductility, compared to many CrFeNi-based HEAs. Nevertheless, high entropy alloy coatings (HEACs) allow these alloys to be exploited as protective films. In this current work, a high-performance Al0.3CrFeNiTi0.3 HEAC was produced by the high-velocity oxygen-fuel (HVOF) thermal spraying technique and characterized by scanning and transmission electron microscopy. Micro-hardness and nano-indentation tests were used to establish a correlation between specific microstructural features and local mechanical properties. Accordingly, strengthening was seen to be enhanced by the presence of dispersed oxides formed by in-flight oxidation “IFO” during deposition. Moreover, this coating exhibits a highly complex multiphase microstructure including ordered structures with distinctive grain morphologies and local chemical heterogeneities that contributed to the attractive mechanical properties.
||Planned: Metallurgical and Materials Transactions