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US 4,905,886 AGranted
Method for diffusion bonding of metals and alloys using thermal spray deposition
AssigneeGrumman Aerospace Corporation
InventorsJames R. Kennedy, Edmund Y. Ting
Life of this patent
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Abstract
Diffusion bonding of aluminum alloy objects of different sizes and shapes may be greatly improved when the surface of the object is exposed to a thermal spray source which deposits fine metal particles on the surface. Rapid quenching of solidification occurs at the surface. Such treatment results in the formation of finer grains at the surface which enhances the strength of a diffusion bond.
Claims8
A method for enhancing diffusion bonding for an object made of an alloy, the method comprising the steps:
- positioning a selected surface area of an object to a thermal spray source;
- and
- depositing molten or semi-molten material to form a coating or layer on the surface area resulting in the formation of a fine-grained microstructure therein exhibiting superplastic properties.
A method for enhancing diffusion bonding for an object made of an alloy, the
- positioning a selected surface area of an object to a thermal spray source;
- and
- depositing a coating of preselected fine-grained metal particles on the surface area as the area is moved relative to the source resulting in the even formation of a fine-grained microstructure therein exhibiting superplastic properties;
- exposing the selected surface area of the object to radiation from a high energy source;
- melting only a surface layer of the selected area;
- quickly cooling the surface layer;
- producing solidification of the surface layer which results in the formation of a fine-grained microstructure therein exhibiting superplastic properties.
4 more elements
Dependencies are inferred from the claim text.