The thermophysical properties of KhN55VMTKYu nickel-based heat-resistant alloy

New experimental data are given for the KhN55VMTKYu industrial nickel-based heat-resistant alloy on its heat capacity at temperatures from $300$ to $1000$ K and on the thermal conductivity coefficient at $T = 380$–$1450$ K. The newly obtained and previously available data are used to construct approximating equations and tables of smoothed values in the range from $300$ to $1200$ K for heat capacity, enthalpy, average heat capacity, thermal conductivity, average coefficient of thermal expansion, density, and thermal diffusivity of the alloy. The effect of disordering of the $\text{Ni}_3$ $(\text{Ti}$, $\text{Al})$ intermetallic compound on the properties of the alloy is examined. The activation energy of disordering of the alloy $Q = 0.93$ eV and the temperature dependence of the enthalpy of disordering are estimated, as well as the concentration of intermetallic compound in the alloy.