METHOD OF FABRICATING A BERYLLIUM-TITANIUM COMPOSITE

摘要

There is provided a process for forming a beryllium/titanium composite of improved strength and ductility from powdered beryllium and powdered titanium material characterized by blending the powders and extruding a canister containing the billet at a temperature of from 1,375 DEG F. to 1,525 DEG F. to a reduction ratio of from 6:1 to 100:1 or greater to form a solid beryllium/titanium composite. At a temperature of 1,450 DEG F. to 1,475 DEG F. and an extrusion reduction ratio of 10:1 or more, compacting of the blend prior to sealing in an extrusion canister is not necessary to develop similar properties. Composite beryllium titanium bodies so fabricated have tensile elongations superior to materials fabricated up to and including 1,300 DEG F. along with equal to improved strength. Tensile prestressing of the as-extruded bodies at 70 to 80 percent of their ultimate tensile strength further improves the yield strength by 50 percent to 100 percent greater and more above that of the as-extruded state with little change in ultimate tensile strength and elongation.