Structure and Physical Properties of Cast and Splat-Quenched CoCr0.8Cu0.64FeNi High Entropy Alloy

The article investigates the structure and physical properties of multicomponent high-entropy alloy CoCr0.8Cu0.64FeNi in cast quenched state. composition under study is analyzed using criteria available literature for predicting phase alloys. These parameters are based on calculations entropy enthalpy mixing also include concentration valence electrons, thermodynamic parameter Ω, which takes into account melting point, mixing, mixing. Another important difference atomic radii between components δ. Cast samples nominal were prepared a Tamman high-temperature electric furnace an argon flow copper mold. weight loss during manufacture ingots did not exceed 1%, average cooling rate was ~ 102K/s. Thereafter, ingot remelted, films obtained from melt. splat quenching technique used this work consisted rapid melt droplets when they collide with inner surface rapidly rotating (~ 8000 rpm) hollow cylinder. rate, estimated film thickness, 106 K / s. X-ray structural analysis performed DRON-2.0 diffractometer monochromatic Cu Kα radiation. Diffraction patterns processed QualX2 program. magnetic measured vibrating sample magnetometer at room temperature. microhardness PMT-3 device load 50 g. In accordance theoretical predictions confirmed by results diffraction studies, alloy, both state, simple solid solution FCC type. lattice liquid-quenched states 0.3593 nm 0.3589 nm, respectively. Measurements showed that can be classified as soft materials. case, liquid state increases coercivity. On samples, increased values obtained. This explained internal stresses arising hardening.