Aircraft aluminum alloy is an is an ultra-high strength deformable aluminum alloy that is currently widely used in the aviation industry. Compared with ordinary aluminum alloys, aluminum alloys used in aircraft have higher requirements for strength, hardness, toughness, fatigue resistance, and plasticity. Aviation aluminum alloys have good mechanical and processing properties, good plasticity after solution treatment, good heat treatment strengthening effect, and generally have high strength below 150°C (or even higher). It is an ideal aviation structural material.
2024 aluminum alloy has excellent mechanical properties and corrosion resistance, and is widely used in aerospace, automobile manufacturing, shipbuilding and other fields. After T3 state heat treatment, the hardness of alloy 2024 t3 is about HB120. After more rigorous T351 state or T4 state heat treatment, the hardness may be higher, reaching about HB140.
A notable feature of 6061 aluminum is its heat treatability. Heat treating 6061 can significantly improve its mechanical properties, especially hardness. The process involves heating the alloy to a specific temperature, holding it at that temperature for a certain period of time, and then cooling it rapidly. Heat-treated 6061-T6 is one of the most common forms of this alloy, with a higher strength level.
7 series aluminum alloys are widely used in aerospace, so they are also called aviation aluminum. They are relatively expensive and are often used in some high-end electronic products. 7005 and 7075 are the highest grades in the 7 series and can be heat-treated and strengthened.
The common states of 7075 are 7075-0, 7075-T6, 7075-T651, and 7075-T7. Although 7075 t5 is searched for, it is rarely found. Among them, 7075-T651 aluminum alloy is of particularly high quality and is known as the best aluminum alloy product. It has high strength, far superior to any mild steel. It also has good mechanical properties and anodic reaction.
Original Source:https://www.aircraftaluminium.com/a/what-is-heat-treatment-aging-of-aircraft-aluminum.html
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