BERYLLIUM RESEARCH AND DEVELOPMENT IN THE AREA OF COMPOSITE MATERIALS.
Quarterly progress rept. no. 1, 1 Jul-30 58,
NUCLEAR METALS DIV TEXTRON INC WEST CONCORD MASS
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The effect of sample width on bend ductility is given for one type of grain-oriented beryllium, for which tensile properties are known. Bend ductility dropped off sharply as relatively narrow widths of the order of 14 - 38 inch were exceeded. Composites consisting of alternate strips of beryllium and aluminum in single layer were formed by aluminum-silicon brazing. An effort was made to determine the dependence of bend ductility, around a 0.200-inch radius, on width of aluminum filler strip. Bend ductility was compared to 1 that of the individual beryllium strip, and 2 that of a beryllium sheet having width equivalent to the sum of beryllium strip widths in the composite. The magnitude of bend ductility in the composite was found to be intermediate between 1 and 2 above. Several Samples braze clad with 316 stainless steel were subjected to bend tests, as were several strip samples of various widths which were coated with Al-Si braze metal.