Thermal conductivity of magnesium-lithium alloys with a body-centered cubic crystal lattice in the temperature range of 80 – 350 K

Thermal conductivity of solid magnesium-lithium alloys with X Li = 35, 40, 50 at. % in the temperature range of 80 – 350 K was measured by a transient plane source method. The obtained results were compared with literature data for alloys of other compositions. For all the studied alloys, anomalous behavior in the form of a kink in the range of 310 – 330 K and a feature near 240 K, presumably associated with a martensitic transformation, was found on temperature dependences λ ( T ). Using literature data, concentration dependences of thermal conductivity of the Mg-Li system were plotted in the range X Li = 0 – 50 at. %. It is shown that an increase in the lithium content in the range of 30 – 50 at. % leads to a further decrease in thermal conductivity.