Ultrasonic Measurements and Mechanical Parameters Evaluation for Tungsten Alloy

Longitudinal and transversal sound velocities of 93W alloy were measured by using a belt type and a cubic-type high pressure apparatus, respectively. Results show that under normal temperature and pressure conditions, this tungsten alloy materials have a longitudinal velocity (cL) of 5.135 km/s and transversal velocity (ct) of 2.987 km/s. Pressure dependence of longitudinal velocity is linear in the pressure range up to 3 GPa, with a form of cL=5.053+0.02p, where p is in unit of GPa. Bulk sound velocity calculated from these data is 3.86 km/s, which is quite close to the shock wave experiment results of 4.008 km/s. Other parameters under normal conditions are: shear modulus G=157.4 GPa, Young's modulus E=393.0 GPa, bulk modulus K=260.2 GPa, Lame coefficients =155.3, =157.4, Possion's rate =0.248.