Ductility of Cross-Rolled Beryllium Sheet - Barrier or Challenge 660291
Production techniques required for the severe forming of commercially available cross-rolled beryllium sheet are described. Configurations prepared with these techniques include straight bends, curved channels, hemispherical segments, and semicylinders with spherical ends. A minimum acceptable bend radius of 5 t, an optimum forming temperature of 1350 F, and shrink and stretch values of 9.0 and 13.0%, respectively, are established by statistical, metallographic, and dimensional analysis. The feasibility of the extreme forming of cross-rolled sheet material, as required for many aerospace applications, is clearly demonstrated.