Investigation of the thermal properties of a system of high-entropy alloys based on CoCrFeMnNi by differential thermal analysis

10.25712/ASTU.1811-1416.2025.03.011

Abstract

The study focuses on the thermal properties of the high-entropy alloy CoCrFeMnNi, which is known for its exceptional plasticity at extreme temperatures and resistance to deformation and wear. The research justifies the choice of this alloy due to its long history of investigation, yet its thermal properties remain insufficiently explored. The subject of the study is the CoCrFeMnNi alloy system, where the composition of iron (Fe) and manganese (Mn) varies from 5% to 30%, while chromium (Cr), cobalt (Co), and nickel (Ni) remain constant at 20% each. The aim of the study is to analyze the thermal transitions and phase changes in the alloy using differential thermal analysis (DTA), a method that allows the detection of endothermic and exothermic reactions during heating and cooling. The methodology involves heating the samples at a controlled rate of 20°C per minute up to 1550°C in an argon atmosphere to prevent oxidation. The results highlight significant differences in thermal behavior depending on the Fe and Mn content, with variations in melting points, phase transitions, and energy distribution. The conclusions show that the chemical composition significantly impacts the alloy's thermal properties, making the findings relevant for further applications in industries requiring high thermal and structural stability.