Fabrication of Test-Articles from Al-Li 2091 for Fokker 100
The technical requirements for introduction of Aluminium-Lithium-alloys in secondary structures of aircraft are formulated. The general corrosion behaviour, stress-corrosion properties and mechanical properties of the alloy 2091-T3 from Cegedur-Pechiney meet these requirements. The successful fabrication of access doors in the underwing fairing of the Fokker 100 is described. The same manufacturing techniques as for 2024 can be used for 2091, i.e. machining, blanking, bending, chemical milling, surface pretreatments, adhesive bonding, solution heat treatment and drop hammer forming, stretch forming, painting and rivetting. Operational in-service trial on Fokker 100 and F28 operated by major airlines as Swissair and Garuda has started. Keywords: Alloys, Metallurgy, Netherlands, Mechanical properties, Al-Li 2091-T3, Fabrication, Fokker 100, Corrosion inhibition. (JG)
Print Book, English, AUG 1989
Defense Technical Information Center, Ft. Belvoir, AUG 1989