The aviation industry pursues innovation and efficiency, and one of the key materials to achieve this goal is aluminum alloy. These lightweight but extremely strong metals have completely changed the way aircraft are manufactured, achieving faster speeds, higher fuel economy and higher payload capacity.
The application and development of aluminum alloys in aerospace can be divided into several stages: in the 1950s, the main goal was to reduce weight and improve the specific stiffness and specific strength of the alloy; in the 1960s and 1970s, the main goal was to improve the durability and damage tolerance of the alloy; in the 1980s, due to the rise in fuel prices, it was required to further reduce the weight of the structure; from the 1990s to the present, the durability and damage tolerance of the alloy have been further improved.
7075 aluminum is one of the strongest alloys among the more commonly used aluminum alloys. This alloy has been used in the aircraft manufacturing industry in the aviation field in the late 1940s, and it is still an ultra-high strength deformable aluminum alloy widely used in the aviation industry.
7075 alloy generally has a small amount of copper, chromium and other alloys added. 7075 t6 aluminum sheet is with high strength and far superior to any mild steel. This alloy has good mechanical properties and anodic reaction.
7075 aluminum alloy has good machinability in the annealed condition and little or no warping during age hardening. It has good corrosion resistance and is further improved by heat treatment and aging. The alloy resists stress corrosion cracking in the 7075-T73 condition. Al-7075 can be resistance welded, but fusion welding is generally not recommended.
2024 aluminum alloy plate is a high-strength alloy that can withstand high stress levels and is commonly used in aircraft structures such as wings and fuselages. It also has corrosion resistance, making it well suited for use in harsh environments.
2024 aluminum alloy plates have excellent strength and performs well at room and low temperatures, making it suitable for applications requiring high strength. Alloy 2024-T3 was introduced by Alcoa in 1931. Its Ai-Cu-Mg structural composition gives it a yield strength of 5ksi, replacing 2017-T4 as the main 2-series aircraft aluminum alloy. 2024 has relatively good fatigue resistance, especially in thick plates, making it suitable for most aircraft structural applications.
Original Source:https://www.aircraftaluminium.com/a/why-is-aeroplane-made-of-aluminium.html
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