In 1906, German Wilm accidentally discovered that after a certain period of time at room temperature, the strength of
aluminum alloy would gradually increase with the prolonged storage time. This phenomenon was later referred to as age hardening, and as one of the earliest core technologies to promote the development of the aircraft
aluminum sheets.In the following hundred years, aircraft
aluminum sheet manufacturers has made many research on
aluminum alloy composition and synthesis methods, and the
aluminum alloy processing technology such as rolling, extrusion, forging, heat treatment,etc.The aircraft
aluminum plate has the advantages of high strength, good processing and formability, low cost and good maintainability. It is widely used in aircraft main structure materials. The improvement of the aircraft properties such as flight speed and structural weight reduction put forwards higher requirements for the
aluminum alloys.There are four main kinds of aircraft
aluminum alloys: 2024,7075,7050 and 6061
aluminum sheet. 2024
aluminium sheet has high fracture toughness and low fatigue crack growth rate. It is the most commonly used aircraft fuselage and underwing material.7075
aluminum plate was successfully developed in 1943. It was successfully applied to the B-29 bomber. The strength of 7075-T6
aluminum alloy is the highest, but but its resistance to stress corrosion is poor.7050
aluminum plate is developed on the basis of 7075
aluminum alloy, which has better strength, anti-flaking corrosion and stress corrosion resistance, and is applied to the compression components of F-18 aircraft.6061
aluminum sheet can also be used on the aircraft. It has good corrosion resistance and excellent welding performance, but the strength is moderately low.