Patent ID: 8881964

Claim:
A method of welding comprising: forming a filler material of a first oxide dispersion strengthened metal, the first oxide dispersion strengthened metal having first strengthening particles that compensate for decreases in weld strength of friction stir welded oxide dispersion strengthened metals, wherein the first strengthening particles have a peak concentration diameter ranging from 2 nm to 70 nm; positioning the filler material between a first metal structure and a second metal structure each being comprised of at least a second oxide dispersion strengthened metal, wherein said filler material is a unitary structure that is positioned along an entirety of an interface to be welded between the first metal structure and the second metal structure, wherein the concentration of the first strengthening particles in said filler material is 5% to 25% greater than the concentration of second strengthening particles in said first and second metal structures; and friction welding the filler material, the first metal structure and the second metal structure to provide a weld, wherein said friction welding begins after the unitary structure of the filler material has been positioned along the entirety of the interface to be welded between the first metal structure and the second metal structure.