The determination of the elastic constants of beryllium in the temperature range 25 to 300 C

The five independent elastic stiffness constants of beryllium have been measured in the temperature range 25 to 300 C, using a direct pulse ultrasonic technique. At 25 C the values for the elastic constants are C 11 =28.88, C 33 =35.42, C 44 =15.49, C 12 =2.01 and C 13 =0.47 in units of 10 11 dyn cm -2 . The macroscopic elastic moduli computed from the experimental data, agree well with the already accepted values for polycrystalline beryllium.