Accession Number : AD0845106

Title :   Development of Beryllium with Improved Impact Resistance.

Descriptive Note : Final technical rept. 15 Dec 65-1 Apr 67,

Corporate Author : BRUSH BERYLLIUM CO CLEVELAND OH

Personal Author(s) : Woodard, D. H. ; Stonehouse, A. J. ; Beaver, W. W.

Report Date : 15 FEB 1968

Pagination or Media Count : 91

Abstract : Polycrystalline beryllium normally fails under ballistic impact at values of 0.3 to 0.7 foot-pounds when the specimen is 0.100 inch thick. This failure is accompanied by fast propagation of cracks resulting in actual shattering of the specimen. While the actual impact energy required to produce a crack was not substantially improved in the course of this work, several procedures were identified which materially limited the propagation of the cracks and delayed the shattering phenomenon. The ballistic impact resistance of 0.100 inch thick single crystal specimens of the major orientations was tested and found to be slightly better than the performance of the polycrystalline metal. The most favorable orientation was impact on a plane inclined at about 45 deg. to the basal plane. (Author)

Descriptors :   (*BERYLLIUM, FRAGMENTATION), (*IMPACT TESTS, BERYLLIUM), IMPACT SHOCK, SHOCK RESISTANCE, PROPAGATION, SINGLE CRYSTALS, TURBINE BLADES.

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE