Metal fusion bonding – Process – With removing or reshaping of filler material or flash after...
Patent
1974-02-11
1976-04-20
Hall, Carl E.
Metal fusion bonding
Process
With removing or reshaping of filler material or flash after...
29509, 29521, 228136, 228174, 228193, 228206, B23K 3102
Patent
active
039508412
ABSTRACT:
The present invention is a method for constructing a solid state diffusion bonded connection which is homogeneous, capable of efficiently transmitting stress and capable of being analyzed. The method provides for the achievement of homogeneous filleted junctures which are required by long-life structural fatigue specifications. The method also provides a mechanical interlock feature which produces a fail-safe connection. By the invented method, only the amount of material required to form the desired structural connection is used. The members to be joined are cut from sheets or plates of a wrought alloy such that a predetermined amount of metal is available to produce the diffusion bond and specified filleting. Minimum force is required to produce the connection since only localized plastic flow diffusion bonding is required in the vicinity of the juncture of the members. The formed connection is homogeneous and has the same properties across the connection as the parent material. The invented method comprises the steps of determining joint flow volumes, establishing ram action tooling and pressure requirements, establishing the restraining tool configuration; assembling the members and tooling in a die assembly; heating the assembly in a vacuum to just below transformation temperature, and applying pressure to the members to cause creep and plastic flow.
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Hall Carl E.
TRE Corporation
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