VERFAHREN ZUR HERSTELLUNG SUPERPLASTISCH GEFORMTER UND DIFFUSIONSGEBUNDENER GEGENSTAENDE UND DIE SO HERGESTELLTEN GEGENSTAENDE

摘要

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.