Welding of single crystal alloys
AssigneeROLLS-ROYCE plc
InventorSimon E. Bray
Life of this patent
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Abstract
A blade member is oscillated in the direction of arrow A-A relative to a rim of a disc; a forge force is applied radially and a weld is formed along line; the blade member is formed from a face centred cubic (FCC) nickel based single crystal alloy, such as CMSX-4 of Cannon-Muskegon Corporation; the orientation of the single crystal blade member is controlled to maximize the stress on the slip plane; by maximizing the stress on the slip plane the in-plane friction forces and the forge force are minimized; minimizing the in-plane forces enables the single crystal blade member to be successfully welded to the rim of the disc.
Claims10
A method of friction welding a first single crystal component to a second component comprising the steps of oscillating the components relative to one another whilst applying a forging force wherein the single crystal component is orientated so that a primary slip plane is aligned to a plane containing both the direction of oscillation and the direction in which the forge force is applied and a primary slip direction is controlled within an angular range about the oscillation direction.
Dependencies are inferred from the claim text.