Abstract: A method for shear forge bonding two or more metal parts having forging compatible compositions is comprised of the steps of sizing parts to be joined across a forged bond line, disposing those parts in forging dies configured to present them in a bonding-effective orientation, shearing surfaces, one on each of the metal parts, located proximately and opposite one another across a gap, under controlled conditions of temperature and atmosphere selected to prevent the formation of any bonding disruptive surface contamination on the sheared surfaces, and then finally forging those parts to close the gap and bring the sheared surfaces into contact under controlled conditions of temperature, pressure, atmosphere, and outer diameter constraint to yield a shear forged bond between the sheared surfaces.

Abstract: A method for preparing rings having an integral stiffening geometric pattern on its outer surface is disclosed. The method employs a variation of the drum rolling process, but it incorporates unique tooling for providing the pattern, preferably comprising a plurality of segments which fit together to define a ring, the inner surface of which presents the desired pattern toward the center of the ring. A unique drum arrangement includes inner and outer components for locking the segments in place and for providing the structural integrity required for the final drum rolling operation. A cylinder, for example an aluminum or aluminum alloy cylinder, is placed in the drum, the cylinder being preformed and presized to fit concentrically within the segment defining ring. Following heating of the assembly to forming temperature, the cylinder is radially expanded using a sizing tool, and the assembly is then placed over a mandrel in preparation for drum rolling.