MECHANICAL CHARACTERISTICS OF HIGH-ENTROPY ALLOYS AND THEIR CONSTITUENT METALS IN FRICTION CONDITIONS AT LOW SLIDING VELOCITIES

Abstract

The mechanical characteristics of high-entropy alloys and their constituent metals were examined in dry friction conditions with diamond at low sliding velocities in air. The friction test was performed at a velocity of 16 mm/sec and a diamond load of 2.2 N. With higher friction coefficient, the wear rate of metals and alloys tends to increase. It is determined that with the growth of the coefficient of friction there is a tendency to increase wear for metals and alloys. The linear wear of metals ranges from 1.06 • 10^–7 for chromium to 12.76 • 10^–7 for aluminum. In this case, the linear wear of multicomponent alloys is lower than of their constituent metals and ranges from 0.35 • 10^–7 to 4.38 • 10^–7. The linear wear of the high-entropy alloys is one second to one fourth that of individual metals because of the difference in hardness, the friction coefficients being equal.