In aviation industry,
2024 aluminum alloy is the main material for aircraft structure because of its low density, high strength and corrosion resistance. In recent years, with the higher requirements for maneuverability and speed, the aircraft will bear more complex load spectrum. Therefore, the mechanical properties and characterization methods of aluminum alloy materials under the action of flight load spectrum have become an essential part of aircraft structure strength design, which has important practical significance for improving the precision of aircraft structure life determination and life extension measures. Many scholars at home and abroad have done a lot of research on the fatigue properties of aluminum alloy. At the end of 1960s, based on the requirement of high fracture toughness of aeronautical materials, 7475 aluminum alloy was developed by the United States. Since then Alcoa company has successfully developed
2024-T3 aluminum alloy with excellent fatigue resistance. This kind of aluminum alloy material with high reliability has been used in B777, C-17, F-35 and other aircraft. After a long period of scientific research, Chalco Aluminum has solved the problem of compiling the load spectrum for aircraft durability design and damage tolerance design. This achievement has been successfully used in the design of six new aircraft types, such as Yunzhou No.8 aircraft, which extends the service life of Yunzhou No.7 aircraft from 15000 h to 25000 h, and the maintenance cycle of Yunzhou No.8 aircraft from 3000 h to 4500 H.
2024 bare aluminum sheet is a typical duralumin alloy in aluminum copper magnesium system. Its composition is reasonable and its comprehensive properties are good. Many countries produce this alloy, which is the largest amount of duralumin. The alloy is characterized by high strength and certain heat resistance, which can be used as working parts below 150 ℃.
2024 aluminum alloy, density 2.85 g / cm3.
The strength of
2024 bare aluminum sheet is higher than that of
7075 aluminum alloy. The formability is better in the hot state, annealing and new quenching state, and the effect of heat treatment is significant, but the heat treatment process is strict. It has poor corrosion resistance, but it can be effectively protected by covering with pure aluminum; it is easy to produce cracks during welding, but it can be welded or riveted by using special technology. It is widely used in aircraft structures, rivets, truck hubs, propeller components and other structural parts.
2024 bare aluminum sheet is widely used in aircraft structures (skin, framework, rib beam, partition frame, etc.), rivets, missile components, truck hub, propeller components and other structural parts.
