Development of Ti 6Al-4v Two Sheet Superplastic Formed and Diffusion Bonded (SPF/DB) Applications 972221
Resolving earlier industry recognized problems associated with two sheet SPF/DB, results in a process that will provide light weight , strong, corrosion and heat-resistant structures for aircraft and other applications. Solutions to the normally inherent problems of stiffening bead collapse/distortion and other associated anomalies have been resolved by utilizing gas-management methods and developing press operating techniques which removes these aesthetic and structural defects from the two sheet SPF/DB process. In addition, the design of this type of structure must be robust and consider bondline locations, weight control methods, stiffening bead definition  and overall producibility. Finite Element Modeling  has greatly assisted in better product and forming definitions prior to final design of two sheet SPF/DB structures.