PREPARATION AND EVALUATION OF HIGH PURITY BERYLLIUM

The zone refining of one inch diameter Brush vacuum cast Be bar was continued, along with the zone refining of smaller diameter vacuum distilled and Pechiney SR grade bars. Three single crystal specimens of varying purity content were tested in tension. Vacuum distilled material which was subsequent...

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Bibliographic Details
Main Authors: Spangler, G E, Herman, M, Damiano, V V, Hoover, D B, Arndt, E J
Format: Report
Language:English
Subjects:
BERYLLIUM
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLIZATION
DEFORMATION
ELECTRON MICROSCOPY
METAL CRYSTALS
Metallurgy and Metallography
METALS
PREPARATION
PURIFICATION
SINGLE CRYSTALS
TENSILE PROPERTIES
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Summary:The zone refining of one inch diameter Brush vacuum cast Be bar was continued, along with the zone refining of smaller diameter vacuum distilled and Pechiney SR grade bars. Three single crystal specimens of varying purity content were tested in tension. Vacuum distilled material which was subsequently zone melted seven passes exhibited a value of 400 psi for the critical resolved shear stress on the basal plane. Additional zone melted polycrystalline was prepared by hot rolling and recrystallizing four pass single crystal Be. Two different orientations with respect to the rolling plane were used. Tensile tests and bend tests were performed, but the results to date are inconclusive. Preliminary examinations have been made of zone refined Be by electron transmission microscopy.