Adeyoye, APopoola, PMathe, Ntombizodwa RPopoola, ODada, MDhliwayo, N2025-01-162025-01-162024-122261-236Xhttps://doi.org/10.1051/matecconf/202440603016http://hdl.handle.net/10204/13944In this study, AlCuFeNiSi0.4 and AlCuFeNiTi0.2 high entropy alloys (HEAs) were synthesized using arc melting. The as-cast alloys were heat treated at 750 °C for 4hrs then quenched in water and oil and aged for 6hrs to examine the influence of the quenching media (water and oil) on the microstructural, nanomechanical, corrosion and wear characteristics of the alloys. The XRD results revealed that both alloys had BCC phase and FCC phase structures, where Ti and Al were the BCC stabilizers and Cu and Ni acted as FCC stabilizers. The excellent combination of hardness and elastic modulus of both alloys quenched in water shows that ageing can improve the properties of the alloys. The alloys quenched in water after ageing offered improved properties compared to those quenched in oil for both alloys. The wear resistance was higher in AlCuFeNiSi0.4 than inAlCuFeNiTi0.2 attributed to the strengthening mechanism of the alloy. Electrochemical tests also showed that the AlCuFeNiSi0.4 alloy composition was more corrosion resistant and easier to passivate in 3.5% NaCl. The combined action of the elements in the HEA composition produced surface oxide layers that were more stable and resistant to corrosion. Hence, the heated treated Si0.4 HEA derivative has the potential to be used as materials in wider corrosive environments in the energy industry.FulltextenAlCuFeNiSi0.4AlCuFeNiTi0.2High entropy alloysHEAsArticlen/a