Influence of the Composition of α-Titanium Alloys on Thermal Conductivity

The results of studies of new Ti–Zr–Al–O titanium alloy with increased thermal conductivity for pipe systems of power equipment are considered. Among titanium alloys, modern α- and pseudo-α-alloys occupy a special place owing to the unique combination of their mechanical properties, corrosion resistance, low density, and high specific strength that determines the effectiveness of their use in various industries. Analysis of structural materials used for heat exchange equipment of nuclear power plants showed that the increase in the efficiency and compactness of pipe systems made of titanium α-alloys is constrained owing to their low thermal conductivity, which does not exceed 8–9 W/(m K) at a temperature of 20°C. An exception is the VT1-0 grade alloy, the field of application of which is limited to a maximum operating temperature of no higher than 250°C.