In the aviation field, the choice of materials plays a decisive role in aircraft performance, safety and fuel efficiency. 2024 aluminum alloy has become an indispensable key material in aviation manufacturing due to its excellent comprehensive performance.
In the 2024 aluminum alloy family, the two states of 2024-T3 and 2024-T351 show unique value in different aviation and other industrial scenarios due to differences in process and performance.
2024 t3 alloy undergoes solution heat treatment, followed by cold working, and finally reaches a stable state through natural aging. 2024-T351 aluminum alloy is first solution heat treated, and then stress is relieved by controlled stretching. Compared with the T3 state, the T351 state has no cold working process, but focuses on stress relief.
Strength and hardness
In terms of strength, 2024-T3 aluminum alloy has higher strength due to the combined effect of cold working and natural aging. Its tensile strength and yield strength are good and can withstand large external forces.
Although 2024-T351 aluminum alloy does not have the dislocation strengthening brought by cold working, its strength can meet the requirements of many structural applications through stress elimination and natural aging. Generally speaking, the strength of 2024-T3 may be slightly higher than that of 2024-T351 in some cases, but the difference is not significant. In terms of hardness, the two states are also relatively close, and both can provide certain wear resistance for parts.
Plasticity and toughness
After cold working, the plasticity of 2024-T3 aluminum alloy will decrease, but due to the maintenance of toughness during the natural aging process, it has a certain toughness while having high strength, and can withstand a certain degree of impact load.
Since 2024 t351 aluminum alloy has not been cold worked, its plasticity is relatively good, which has advantages in some application scenarios where the material needs to be deformed greatly without cracking. At the same time, its toughness can also meet the use requirements of most structural parts, and it is not easy to brittle fracture when subjected to impact.
Dimensional stability and stress corrosion resistance
One of the biggest advantages of 2024-T351 aluminum alloy is its excellent dimensional stability. Through the stress relief process, the residual stress inside the material is greatly reduced, and the dimensional changes of the parts are minimal during subsequent processing and use. This makes the T351 state particularly suitable for applications with extremely high dimensional accuracy requirements.
In terms of stress corrosion resistance, 2024-T351 also performs better than 2024-T3 due to its lower residual stress. 2024 aluminum alloy itself has a high copper content and its corrosion resistance is relatively poor compared to other aluminum alloys, while the T351 state reduces the risk of stress corrosion cracking by reducing internal stress.
2024 t3 aluminum uses
In the aerospace field, 2024-T3 aluminum alloy is often used to manufacture non-critical structural parts of aircraft, such as some internal frames, door components, etc. In the automotive industry, 2024-T3 can be used to manufacture some high-performance automotive parts, such as engine brackets, etc. In the field of electronic equipment manufacturing, some shells or frames that have certain requirements for strength and heat dissipation will also use 2024-T3 aluminum alloy.
2024-T351 applications
The aerospace field is undoubtedly an important application scenario for 2024-T351 aluminum alloy. Due to its excellent dimensional stability and stress corrosion resistance, it is widely used in the manufacture of key aircraft structural parts, such as wing beams, fuselage frames, etc. These parts are under huge loads during the flight of the aircraft, and have extremely high requirements for material reliability and dimensional accuracy. 2024-T351 can just meet these stringent requirements.
In the field of precision machinery manufacturing, such as parts of high-end machine tools, brackets of optical instruments, etc., 2024-T351 aluminum alloy can ensure the accuracy and performance stability of precision equipment during long-term use due to its good dimensional stability.
Original Source:https://www.aircraftaluminium.com/a/2024-t3-vs-t351-aluminum-alloy.html
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