Method of superplastically forming and diffusion bonding a lamin

Details Method of superplastically forming and diffusion bonding a lamin Method of superplastically forming and diffusion bonding a lamin

1989-02-03

1991-01-15

Eley, Timothy V.

Metal fusion bonding

Process

With shaping

294211, 29888, 72709, 228193, B21D 3900

Patent

active

049847325

ABSTRACT:
A method is provided for achieving predetermined thickness requirements throughout a superplastically formed structure having extreme contours. A laminate assembly of sheets of a metal capable of exhibiting superplasticity, such as titanium alloy, is formed by a combination of superplastic forming and diffusion bonding. The shapes and positioning of the sheets is selected to provide extra metal where the greatest degree of stretching is necessary, such as around the lobes of an exhaust mixer for a turbofan aircraft engine. The gauge can thus be controlled throughout the structure while avoiding weak points and undue weight.

REFERENCES:
patent: 4087037 (1978-05-01), Schur et al.
patent: 4429824 (1984-02-01), Woodward
patent: 4833768 (1989-05-01), Ecklurd et al.

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