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Accession Number:
AD0275750
Title:
PREPARATION AND EVALUATION OF HIGH PURITY BERYLLIUM
Corporate Author:
FRANKLIN INST PHILADELPHIA PA LABS FOR RESEARCH AND DEVELOPMENT
Report Date:
1962-04-02
Abstract:
The production of high purity Be and its deformation and fracture characteristics are being studied. It was demonstrated that the extent to which the basal plane can glide, within the restriction of the type of tensile test, is related to the amount of impurities present in the Be. The limited ductility of the polycrystalline material apparently results from the constraining effects of neighboring grains upon one another rather than as a result of the basal planes being unable to sustain flow without cracking. It is felt, however, that the decrease in yield strength and work hardening observed in the zone refined single crystals will tend to reduce the tendency for crack formation resulting from nonhomogeneous basal slip. The preparation and evaluation of Be single crystals of higher purity through the use of higher purity starting materials will be made. Another phase will be devoted to an evaluation of the effects of realloying zone refined Be with selected impurities. Transmission electron microscopy studies of thin films of zone refined beryllium will also be conducted. A final phase will be devoted to the determination of residual resistivity ratios of zone refined and re-alloyed beryllium by means of the eddy current technique. Author
Pages:
0042
Contract Number:
NOw-62-0536
File Size:
0.00MB
