Notched Bend Behavior of Beryllium over a Wide Range of Strain Rates
Interim technical rept. Sep 1973-Mar 1975
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH
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Three point bend tests on U-notched Charpy specimens were conducted for six grades of beryllium over a range in loading rates from 0.000 001 to 10 msec. Load-deflection curves were obtained from tests performed on a servo- controlled hydraulic testing machine at low and intermediate loading rates and with a Hopkinson pressure bar apparatus at high rates. Curves of absorbed energy, maximum load, and maximum deflection against loading velocity indicate a transition velocity for several grades of beryllium at which the ductility of the material decreases sharply.
- Metallurgy and Metallography