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This research was funded by the commissioned task entitled “VIA CARPATIA Universities of Technology Network named after the President of the Republic of Poland Lech Kaczynski” contract no. MEiN/2022/DPI/2575, MEiN/2022/DPI/2577, MEiN/2022/DPI/2578 action entitled “ISKRA—building inter-university research teams”.
High-entropy alloys are of interest to many researchers due to the possibility of shaping
their functional properties by, among other things, the use of alloying additives. One approach
to improving the wear resistance of the AlCoCrFeNi alloy is modification through the addition
of titanium. However, in this study, an alternative solution was explored by adding vanadium,
which has a completely different effect on the material’s structure compared to titanium. The
effect of vanadium additives on changes in the microstructure, hardness, and wear resistance of
the Al0.7CoCrFeNi alloy. The base alloys Al0.7CoCrFeNi and Al0.7CoCrFeNiV0.5 were obtained by
induction melting. The results showed that the presence of vanadium changes the microstructure
of the material. In the case of the base alloy, the structure is biphasic with a visible segregation of
alloying elements between phases. In contrast, the Al0.7CoCrFeNiV0.5 alloy has a homogeneous solid
solution bcc structure. The presence of vanadium increased hardness by 33%, while it significantly
reduced friction wear by 73%. Microscopic observations of friction marks indicate differences in the
wear mechanisms of the two materials.
