Dynamic Elastic Properties of Polycrystalline Tungsten, 24°–1800°C

The velocities of ultrasonic shear and compressional waves in polycrystalline tungsten (99.4% dense) have been measured by a pulse‐echo technique from 24° to 1800°C. Adiabatic elastic constants have been calculated from these velocities with accuracies of ±0.25% to ±0.65%, and corrections have been applied to obtain the following equations for the elastic constants of fully dense tungsten vs temperature (°C): $$\begin{array}{c}{\text{G=1.5893×10}}^{12}{\text{−1.4733×10}}^8{\text{T−2.448×10}}^4{T}^2\hspace{0.17em}{\mathrm{dyn-cm}}^{\text{−2}},\\ {\text{L=5.2415×10}}^{12}{\text{−3.7399×10}}^8{\text{T−4.598×10}}^4{T}^2\hspace{0.17em}{\mathrm{dyn-cm}}^{\text{−2}},\\ {\text{K=3.1224×10}}^{12}{\text{−1.7755×10}}^8{\text{T−1.333×10}}^4{T}^2\hspace{0.17em}{\mathrm{dyn-cm}}^{\text{−2}},\\ {\text{E=4.0761×10}}^{12}{\text{−3.5521×10}}^8{\text{T−5.871×10}}^4{T}^2\hspace{0.17em}{\mathrm{dyn-cm}}^{\text{−2}},\\ {\text{v=0.28247+6.1902×10}}^{\text{−6}}{\text{T+3.162×10}}^{\text{−9}}{T}^2.\end{array}$$