Metal fusion bonding – Process – Using dynamic frictional energy
Patent
1998-04-30
1999-10-26
Heinrich, Samuel M.
Metal fusion bonding
Process
Using dynamic frictional energy
228119, B23K 2012
Patent
active
059712520
ABSTRACT:
The present invention provides an in-process method to repair voids in an aluminum alloy, particularly a friction stir weld in an aluminum alloy. For repairing a circular void or an in-process exit hole in a weld, the method includes the steps of fabricating filler material of the same composition or compatible with the parent material into a plug form to be fitted into the void, positioning the plug in the void, and friction stir welding over and through the plug. For repairing a longitudinal void (30), the method includes machining the void area to provide a trough (34) that subsumes the void, fabricating filler metal into a strip form (36) to be fitted into the trough, positioning the strip in the trough, and rewelding the void area by traversing a friction stir welding tool longitudinally through the strip. The method is also applicable for repairing welds made by a fusing welding process or voids in aluminum alloy workpieces themselves.
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Litwinski Edward
Rosen Charles D.
Valdez Juan M.
Field Harry B.
Heinrich Samuel M.
The Boeing Company
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