Superplastic forming and diffusion bonding (SPF/DB) is a technique allowing to manufacture complex-shaped hollow metallic parts. It combines Superplastic forming (SPF) with a second element "Diffusion Bonding" to create the completed structures.
Contents
Principle
Two metal sheets are welded together at their edges, then heated within the confines of a female mould tool.
When the part is hot, an inert gas is injected between the two sheets ; the part becomes hollow to the form of the mould. Parts may be welded in other areas than the edges to give an internal structure as the sheets are blown.
Applications
References
Superplastic forming and diffusion bonding Wikipedia(Text) CC BY-SA