Preparation of 7XXX aluminum alloys for adhesive bonding
AssigneeArconic Technologies LLC
InventorsJune M. Epp, Ali Unal
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Abstract
A preparation method for adhesive bonding of magnesium-containing aluminum alloy products includes a magnesium-containing aluminum alloy product including a matrix and a surface oxide layer overlying the matrix. The magnesium-containing aluminum alloy product also includes intermetallic particles at least proximal the surface oxide layer. The method also includes ablating at least some of the intermetallic particles via an energy source, and in the absence of melting of the matrix of the magnesium-containing aluminum alloy product.
Claims20
An automotive aluminum alloy sheet product comprising:
- an outer surface;
- wherein the outer surface comprises a first zone and a second zone;
- wherein the first zone comprises a plurality of ablation pits;
- wherein the second zone is absent of ablation pits;
- wherein the automotive aluminum alloy sheet product comprises a matrix and a surface oxide layer overlaying the matrix,
- wherein at least a portion of the outer surface is formed by the surface oxide layer,
- wherein the automotive aluminum alloy sheet product is suitable for a vehicle component.
An automotive aluminum alloy sheet product comprising an upper surface and a lower surface;
- wherein the upper surface of the automotive aluminum alloy sheet product comprises a surface oxide layer disposed on an aluminum alloy matrix;
- wherein the surface oxide layer comprises an MgO portion;
- wherein the surface oxide layer comprises Al2O3 portion;
- wherein the MgO portion is at least partially disposed on the Al2O3 portion;
- wherein the surface oxide layer is absent of copper-bearing intermetallic particles;
- wherein the automotive aluminum alloy sheet product comprises a plurality of ablation pits;
- wherein the plurality of ablation pits are proximal the surface oxide layer;
- wherein the plurality of ablation pits are proximal the aluminum alloy matrix;
- wherein the plurality of ablation pits are absent of copper plating.
Dependencies are inferred from the claim text.