Effect of Inclusions on the Mechanical Behavior of Beryllium.
Final technical rept. 15 Jun 74-15 Oct 75,
BRUSH WELLMAN INC CLEVELAND OHIO
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Samples of hot pressed and hot isostatically pressed S-65 beryllium were prepared from billets salted with iron base and graphite particles. Quasistatic tension, biaxial disc, and interally pressurized ring tests were performed to evaluate the effects of the resultant inclusions on the mechanical properties of beryllium. Inclusions in salted billets were characterized and compared with those found in production pressings. Fracture surfaces at inclusions were examined. Results indicate that inclusions degrade the mechanical properties of beryllium but not catastrophically. Surface inclusions were found to be more deleterious than internal inclusions. The salting technique was found to provide a convenient method for producing material for test specimens having inclusions of a predetermined type, size range, and number, which are representative of those found in production pressings. Author
- Metallurgy and Metallography