The process of evaluating a new material for use in a civil transport aircraft is rather complex and long. The introduction of Al-Li appears as being a particular difficult item. Initially developed for application in combat aircraft aiming for high strength properties, a civil transport airplane however requires Al-Li in a damage tolerant version. Equivalence to existing alloys is requested (equal or better) but Al-Li demands a compromise between major properties as strength, damage tolerance and corrosion resistance. Progress in achieving acceptable and harmonized material quality is very slow and time constraints have prevented introduction in a planned way in a number of programs. The question is raised whether a cost effective use of Al-Li can be envisaged over the next years.
Point of View of a Civil Aircraft Manufacturer on Al-Li Alloy
1989
5 pages
Report
No indication
English
Aircraft , Nonferrous Metals & Alloys , Aluminum alloys , Lithium alloys , Structural design criteria , Damage , Technology transfer , Tolerances (Mechanics) , Civil aviation , Corrosion resistance , Cost effectiveness , Fatigue tests , Transport aircraft , Weight reduction , Foreign technology , Aircraft construction materials
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