Method for superplastic forming

Details Method for superplastic forming Method for superplastic forming

1980-05-16

1982-10-19

Gilden, Leon

Metal deforming

With exposure of work to gas, vapor, mist, or modified...

72 60, 72342, 72364, B21B 900

Patent

active

043543693

ABSTRACT:
A method is provided for eliminating internal voids in superplastically forming parts. A blank of material which is capable of being formed superplastically is held opposite a forming surface of a die. The blank is heated to the superplastic forming temperature and pressure is applied to both sides of the blank. This pressure is sufficient to prevent the formation of voids. The pressure on the side of the blank farthest from the die surface is then increased to superplastically form the material against the die surface. In a second embodiment, the pressure is applied after the blank has been formed either by maintaining the forming pressure to compreses the material between the forming pressure and the reaction of the die, or by applying a fluid pressure to both sides of the part, thereby removing voids by plastic deformation and diffusion.

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patent: 4197777 (1980-04-01), Deminek
patent: 4233829 (1980-11-01), Hamilton
patent: 4233831 (1980-11-01), Hamilton et al.
patent: 4266416 (1981-05-01), Festag et al.

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