Friction stir welding and processing of oxide dispersion strengthened (ODS) alloys
AssigneeUT-Battelle, LLC
InventorWeiju Ren
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Abstract
A method of welding including forming a filler material of a first oxide dispersoid metal, the first oxide dispersoid material having first strengthening particles that compensate for decreases in weld strength of friction stir welded oxide dispersoid metals; positioning the filler material between a first metal structure and a second metal structure each being comprised of at least a second oxide dispersoid metal; and friction welding the filler material, the first metal structure and the second metal structure to provide a weld.
Claims22
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.
A method of welding comprising:
- positioning a filler material comprised of a first oxide dispersion strengthened metal between a first metal structure and a second metal structure, the first metal structure and the second metal structure being comprised of at least a second oxide dispersion strengthened metal having second strengthening particles with a peak concentration diameter ranging from 2 nm to 70 nm, 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, and the first oxide dispersion strengthened metal has a concentration of first strengthening particles that is 5% to 25% greater than a concentration of the second strengthening particles in the at least the second oxide dispersion strengthened metal;
- and
- friction welding the filler material, the first metal structure and the second metal structure to provide a weld joining the first metal structure to the second metal structure, 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.
The method of claim, wherein the at least one of the first oxide dispersion metal and the second oxide dispersion strengthened metal comprises a first strengthening particle is an oxide comprised of yttrium (III) oxide (Y2O3), aluminum (III) oxide (Al2O3), hafnium (IV) oxide (HfO2), lanthanum(III) oxide (La2O3), titanium oxide (Ti2O3), cerium(IV) oxide (CeO2), and cerium(III) oxide (Ce2O3) or a combination thereof.
Dependencies are inferred from the claim text.