PREPARATION AND EVALUATION OF HIGH PURITY BERYLLIUM. Quarterly Progress Report, October 2, 1962-January 1, 1963

Technical Report · Thu Oct 31 04:00:00 EST 1963

OSTI ID:4711611

Spangler, G E; Herman, M; Arndt, E J; Hoover, D B; Damiano, V V

Work is being carried out to produce high-purity Be and to study its deformation and fracture characteristics. The zone melting of one one-inch- diameter vacuum-cast and extruded bar was completed. A total of 11 passes was made through this bar at a rate of one-half inch per hour. A single-crystal specimen of a Cu-- Be alloy was tested in tension with the crystal oriented for basal glide. A tensile test was also performed on a nine-pass single crystal oriented with the c-axis parallel to the tensile axis. Results indicated that purification reduced the stress for twinning by one half. A sample of the Be--5 wt.% Cu crystal was hot swaged at 525 l C. The as-swaged wire was recrystallized and showed a definite ( 1 0 10) wire texture. Bend tests of the wire annealed at 750 and 900 l C showed the same behavior exhibited by unalloyed hot-swaged Be. Metallographic studies of the inter-crystalline fracture phenomenon observed in hot-swaged wire were continued. Polycrystalline beryllium specimens, prepared by hot rolling zone-refined single crystals, were studied using electron transmission microscopic techniques. Be/sup 7/ was used as a tracer to study self-diffusion in specimens prepared from a zone-refined beryllium single crystal. (M.C.G.)

• Research Organization: Franklin Inst. Labs. for Research and Development, Philadelphia
• NSA Number: NSA-17-023937
• OSTI ID: 4711611
• Report Number(s): AD-403757; Q-B1933-5
• Country of Publication: United States
• Language: English

Related Subjects

BERYLLIUM
BERYLLIUM 7
BERYLLIUM ALLOYS
CONFIGURATION
COPPER ALLOYS
DIFFUSION
ELECTRON MICROSCOPY
FAILURES
HOT WORKING
IMPURITIES
MELTING
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
MONOCRYSTALS
PREPARATION
RECRYSTALLIZATION
REFINING
REPORT
ROLLING
TENSILE PROPERTIES
TRACER TECHNIQUES
WIRES
ZONES