Effect of Pulse Parameters on Structure, Magnetic, Microhardness, and Wear Properties of Electrodeposited FeCoNiMoW High-Entropy Alloy

FeCoNiMoW high-entropy alloy coatings were synthesized on a copper substrate using pulse electrodeposition. The effects of different frequencies and duty cycles on the phase, composition, microstructure, mechanical, and magnetic properties of the coatings were examined using XRD, SEM, and VSM techniques. The results revealed that the coatings obtained at lower duty cycles and higher pulse frequencies exhibited higher molybdenum and tungsten content, along with the highest amorphization percentage. The high-entropy alloy deposited at a frequency of 50 Hz and a duty cycle of 40 pct exhibited the highest microhardness, the lowest friction coefficient, and the lowest wear rate. All coatings exhibited properties typical of soft magnetic materials. The lowest coercive force (7 Oe) was observed in the coating obtained at a frequency of 100 Hz and a duty cycle of 40 pct. The coating obtained at a duty cycle of 10 pct and a frequency of 10 Hz exhibited the highest magnetic saturation (107.2 emu/g).