Metal fusion bonding – Process – With shaping
Patent
1995-03-28
1997-11-18
Bradley, P. Austin
Metal fusion bonding
Process
With shaping
228181, 228193, 228265, B23K 2000, B23K10102
Patent
active
056879008
ABSTRACT:
A method of fabricating a structural panel having a predetermined shape features forming an inflatable envelope assembly from at least a pair of superplastically formed and diffusion bonded metallic core sheets. The inflatable envelope assembly can be disposed between first and second metallic face sheets which are generally superplastically formed into the predetermined shape prior to being assembled. Thereafter, the assembled face sheets and the inflatable envelope assembly can be superplastically formed and diffusion bonded to form an integral structure, such as structural panel having a compound curvature. Alternatively, the inflatable envelope assembly can be disposed between a pair of reinforced titanium composite sheets. The reinforced titanium composite sheets can also be joined to adjacent face sheets, such as by welding or diffusion bonding, such that an integral structural panel having the predetermined shape can be readily fabricated. The reinforced titanium composite sheets have a flow stress greater than the inflatable envelope assembly and the face sheets to provide increased strength and stiffness for the resulting structural panel.
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"Superplastic Forming/Diffusion Bonding," NA-77-902, Rockwell International, Rev 8-78, pp. 1-16.
Russom Jeffery D.
Zaccone Mark A.
Bradley P. Austin
Knapp Jeffrey T.
McDonnell Douglas Corporation
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