Stock material or miscellaneous articles – All metal or with adjacent metals – Workpiece with longitudinal passageway or stopweld material
Patent
1990-05-16
1992-08-18
Zimmerman, John J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Workpiece with longitudinal passageway or stopweld material
428593, B32B 330
Patent
active
051398877
ABSTRACT:
Methods of making superplastically formed and diffusion bonded articles are disclosed as well as the articles made from such methods. Metal sheets are superplastically formed and diffusion bonded in a manner such that pillows are formed on respective outer surfaces thereof, providing a cellular structure interconnected by channels permitting control of gas pressure with the cells. The cellular structure can, in one embodiment, be twisted and the cells can be inflated through superplastic forming. The twisted cellular structure is particularly useful as an intermediate stiffener for an airfoil.
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Zimmerman John J.
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