Dynamic Properties of S-200-E Beryllium
Final rept. 29 Apr-31 Aug 1971
GENERAL MOTORS TECHNICAL CENTER WARREN MI MATERIALS AND STRUCTURES LAB
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Results of an experimental study of the dynamic properties of S-200- E beryllium are presented. Areas studied included uniaxial stress behavior, elastic constants, equation of state, elastic precursor decay, and shock wave profiles. The material showed a yield plateau and then significant strain hardening, and exhibited strain rate sensitivity. Longitudinal and shear wave velocities at 20C were 12.84 and 8.86 mmmicrosec. The shock wave equation of state up to 30 kb was determined to be linear sigma sub H 0.7 152.7 u sub p. Compressive wave tests showed a ramped, non-steady-state elastic precursor, and shock wave profiles showing both release behavior and attenuation were obtained. Scanning microfractographs were taken of spall fracture surfaces.
- Metallurgy and Metallography