DEVELOPMENT OF TECHNIQUES FOR PRODUCING BERYLLIUM STRUCTURAL SHAPES. Second Interim Technical Report FOR Period October 29, 1960-January 28, 1961

The technical effort expended in the first three months after starting Phase II is described. The initial effort included the formulation of a detailed technical program with the prime objective of producing beryllium sheet and strip having properties of 55,000 and 75,000 psi in yield strength and ultimate strengih, respectively. Various starting materials and rolling and extrusion parameters were evaluated for ultimate application in subsequent forming of structural angles, channels, and zees through bending processes. Studies of the other structural shapes, including tees, rounds, and squares, indicated that gross deformation processes are necessary to obtain the required properties. Square extrusions and hot-pressed stock were prepared for deformation experiments. (auth)