Abstract
High-entropy alloys (HEAs) have gained significant interest in recent years because of their outstanding properties. The AlCoCrFeNi alloy is one of the most studied HEAs. The effect of the manufacturing methods and heat treatment on the properties of the high-entropy AlCoCrFeNi alloy is under intense scrutiny. The effect of varying component content on properties of the alloy is frequently analysed. Aluminium is most popular due to its impact on alloy microstructure and occurrence of phases. Research is also conducted on the influence of alloying additives, such as boron and titanium, on the properties of the AlCoCrFeNi alloy. High-entropy alloys also have excellent mechanical properties at high temperatures. Excellent structural and functional properties make them suitable for application in the most demanding conditions. The research conducted on HEAs still provides a lot of new and valuable information on the properties and structures of these alloys. This article summarizes the most important information about HEAs, specifically the AlCoCrFeNi alloy.
Highlights
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Five of them related to checking deformation behaviour, annealing, and wear resistance. Another two investigated thin films of high-entropy alloys obtained by magnetron sputtering and the last two were related to High-entropy alloys (HEAs) elements in the form of thermal coatings
The highest yield strength and hardness was observed in the AlCoCrFeNiV alloy (1726.5 MPa, 648.8 HV, respectively), whereas the highest plastic strain and compressive strength was noted in the AlCoCrFeNiV0.2 alloy (26.8%, 3297.8 MPa, respectively)
Summary
The design of traditional alloys is based on mixing one or two main components e.g., iron, titanium, aluminium, and adding small amounts of other elements to improve the properties by controlling the microstructure of the resulting alloy. Five of them related to checking deformation behaviour, annealing, and wear resistance Another two investigated thin films of high-entropy alloys obtained by magnetron sputtering and the last two were related to HEA elements in the form of thermal coatings. The conducted experiments showed that particular HEAs have excellent oxidation resistance [12], wear resistance [13], and corrosion resistance [14] These alloys are still not completely researched, so there is a perspective of discovering materials with unprecedented properties, which may result in innovative products and processes
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