Method of superplastic forming with concurrent diffusion...

Details Method of superplastic forming with concurrent diffusion... Method of superplastic forming with concurrent diffusion...

B - Operations, Transporting

23

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B23K 31/00 (2006.01) B21D 26/02 (2006.01) B23K 20/00 (2006.01) B23P 15/26 (2006.01)

Patent

CA 1039008

METHOD FOR SUPERPLASTIC FORMING OF METALS WITH CONCURRENT DIFFUSION BONDING ABSTRACT A method for fabrication of metal structures, especially those with a complex variable thickness form, in which a metal such as a titanium alloy blank is superplastically formed and concurrently diffusion bonded to other metal workpieces to form a desired structure. The metal blank, at least one shaping member, and at least one metal workpiece to be bonded to the metal blank are located within an enclosure. The metal blank and metal workpieces are heated to a suitable forming and bonding temperature and the metal blank stretched substantially in excess of the original surface area under a fluid pressure loading causing it to deform against the shaping member and intimately contact the other metal workpieces for diffusion bonding. An inert gas and/or vacuum environment can be provided in the enclosed area to prevent contamination by air at the elevated temperatures employed. -1-

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