Superplastic forming (SPF) combined with diffusion bonding (DB) has been used successfully for the fabrication of titanium aerospace hardware. Many of these applications have been for military aircraft, whereby a complex built-up structure has been replaced with monolithic parts. Several methods for applying the two- and four-sheet titanium SPF/DB processes have been devised, including the welding of sheets prior to forming and the use of silk-screened stop-off (yttria) to prevent bonding where it is undesirable. Very little progress has been made in the past few years toward understanding and modeling the SPF/DB process using constitutive equations and data by laboratory testing. Concerns that engineers face in designing for fatigue life, acceptable design loads, and damage tolerance are currently being studied, but the database is very limited. This is a summary of past work found in the literature and forms the foundation for additional research.
Examination of superplastic forming combined with diffusion bonding for titanium: Perspective from experience
Journal of Materials Engineering and Performance ; 13 , 6 ; 744-752
2004
9 Seiten, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
Militärflugzeug , Superplastizität , Anwendung in der Luft- und Raumfahrt , schnelle Prototypentwicklung , Skin-Effekt , Sandwich-Bauweise , Dehnungsgeschwindigkeit , Korngröße , Kornform , mathematisches Modell , Warmumformen , Fertigungstechnik , superplastisches Umformen , Titanlegierung , Diffusionstechnik
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