EFFECT OF Al CONTENT ON THE MICROSTRUCTURE, MICROHARDNESS AND CORROSION RESISTANCE OF AlxCoCrFeNiMo0.5 HIGH-ENTROPY ALLOYS
Samoilova O. Pratskova S. Shaburova N. Moghaddam A.O. Lezhnev S. Panin E. Trofimov E.
2 November 2025University of Chemical Technology and Metallurgy
Journal of Chemical Technology and Metallurgy
2025#60Issue 61091 - 1098 pp.
The microstructure, microhardness and corrosion resistance (in a 1 M NaCl) of as-cast AlxCoCrFeNiMo0.5 (x = 0, 0.25, 0.5) high-entropy alloys (HEAs) were studied. The as-cast samples exhibited a dendritic microstructure in which a (CrFeMo)-type molybdenum-rich σ-phase precipitated in the interdendritic space. It was determined that Al alloying increases the microhardness from 285 HV0.3 for CoCrFeNiMo0.5 HEA to 628 HV0.3 for Al0.5CoCrFeNiMo0.5 HEA. At the same time, aluminium has a negative effect on the corrosion resistance of the studied alloys, where an increase in Al concentration, increases the corrosion current by two orders of magnitude. Copyright (c) 2025 Journal of Chemical Technology and Metallurgy. This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
corrosion , high entropy alloys , microhardness , microstructure
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South Ural State University, Chelyabinsk, Russian Federation
Chelyabinsk State University, Chelyabinsk, Russian Federation
HSE University, Moscow, 101000, Russian Federation
Rudny Industrial University, Rudny, Kazakhstan
Karaganda Industrial University, Temirtau, Kazakhstan
South Ural State University
Chelyabinsk State University
HSE University
Rudny Industrial University
Karaganda Industrial University
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