7075 aluminum plate belongs to the Al-Zn-Mg-Cu system of super-hard aluminum, 7075 alloy is the late 1940s has been applied to the aircraft manufacturing industry, and is still widely used in the aviation industry of ultra-high-strength deformed aluminum alloy. It is characterized by good plasticity after solid solution treatment, particularly good heat treatment strengthening effect, high strength below 150 degree , and particularly good low temperature strength; poor welding performance; stress corrosion cracking tendency; need to be wrapped in aluminum or other protection treatment use. Double-stage aging improves the alloy's resistance to stress corrosion cracking. Plasticity in the annealed and just quenched state is slightly lower than the same state of 2A12. slightly better than 7A04, static fatigue of the plate. Notch sensitive, stress corrosion performance is better than 7A04, of which 7075-T651 state is particularly superior, known as the aluminum alloy in the most excellent products, high strength, far better than soft steel. This alloy has good mechanical properties and anodic reaction, is a typical aerospace military special aluminum alloy materials.
