Aluminum alloy is one of the most widely used non-ferrous metal structural materials in industry, which has been widely used in aviation, aerospace, automobile, machinery manufacturing, ship and chemical industry. With the rapid development of the industrial economy, the demand for aluminum alloy welded structural parts is increasing day by day, which makes the research on the weldability of aluminum alloy in-depth. Aluminum alloy is the most widely used alloy.
Alumina was reduced to aluminum by electrolysis in the laboratory in 1808. It was used as building material in 1884 on the spire of Washington Monument in the United States. The aluminum alloy material, which was synthesized by adding various metal elements, has been widely used in all aspects of the construction industry.
In 1908, Alcoa invented electrical aluminum alloy 1050, and made steel core aluminum strand, creating the pioneer of high-voltage long-distance transmission.
In 1915, Alcoa invented 2017 alloy and in 1933, 2024 alloy, which made the application of aluminum in aircraft expand rapidly. In 1933, American aluminum company invented 6061 alloy, and then created the quenching process of the extruder, which significantly expanded the application scope of extrusion profile.
In 1943, Alcoa invented 6063 alloy and 7075 alloy, creating a new era of high-strength aluminum alloy.
In 1965, American aluminum company invented A356 cast aluminum alloy, which is a classic cast aluminum alloy.
With the development of research on aluminum alloy materials, high-strength aluminum alloy (2000, 7000 Series) has been widely used in commercial aircraft for its excellent comprehensive properties, which has reached more than 80% of its structural quality. Therefore, it has been paid more and more attention from the global aviation industry. Aluminum alloy is gradually applied to life, military, science, and technology.