Since 7075 aluminum alloy was developed by Alcoa in 1943, it has been very popular in many fields due to its high strength and heat-treatable properties. It is mainly composed of aluminum, zinc, magnesium, chromium and copper. After different heat treatment processes, it can present different performance states, of which T7351 and T73 are two representative tempers.
Aluminium 7075 t7351 is known for its excellent strength-to-weight ratio and good fatigue resistance. After a specific heat treatment, it has a high tensile strength, usually up to about 570MPa (82,700psi), and a yield strength of about 480MPa (69,600psi). This high strength makes it perform well in some environments with strict material strength requirements, and can withstand large external forces without deformation or damage. Good fatigue resistance means that it can maintain stable performance under repeated loads, greatly extending its service life.
Unique Heat Treatment Process
The heat treatment process consists of several key steps. The first is solution heat treatment, during which the material is heated to a specific temperature range and then quickly quenched to fully dissolve the alloying elements and obtain a uniform microstructure. Then there is a stabilization treatment, which keeps the material at a low temperature for a period of time. This step can effectively eliminate residual stress and significantly improve the dimensional stability of the material. Finally, the aging treatment is carried out, which further optimizes the mechanical properties of the material and enhances its strength and toughness by heating it at a controlled temperature for a specific period of time.
Application fields
Based on the above excellent performance, 7075-T7351 aluminum alloy is widely used in many high-end fields. In the field of aerospace, it is often used to manufacture key components such as aircraft wings and fuselages to ensure the structural safety and stability of aircraft in complex high-altitude environments.
In the military field, it can be used to manufacture armored vehicles, weapons and equipment, etc., to meet their strict requirements for material strength and durability under extreme conditions; in high-performance sports equipment, such as bicycle frames and golf clubs, its high strength and good fatigue resistance are used to improve the performance and service life of the equipment.
Excellent stress corrosion cracking resistance
A notable feature of 7075-T73 aluminum is its excellent stress corrosion cracking resistance. In some special environments, the material may crack due to the combined effect of stress and corrosive media, which is extremely dangerous for many structural parts. 7075-T73 uses a special heat treatment process to effectively improve the microstructure of the material and enhance its ability to resist such stress corrosion cracking. While ensuring a certain strength, it greatly improves the reliability of the material in harsh environments.
Moderate strength
Although the strength of 7075-T73 is slightly lower than that of the T6 state, it can still meet many application scenarios with certain strength requirements. It maintains moderate strength while highlighting its resistance to stress corrosion cracking. This performance balance makes it have unique advantages in some fields with specific requirements for the comprehensive performance of materials.
Both 7075-T73 and T7351 are essentially the products of specific heat treatment of 7075 aluminum alloy. Based on T73, T7351 further optimizes certain properties of the material through more precise control and processing technology, such as more outstanding performance in strength and fatigue resistance. However, both of them play an important role in their respective applicable fields with their good stress corrosion cracking resistance.
Due to its excellent stress corrosion cracking resistance and moderate strength, 7075-T73 aluminum alloy is often used in the manufacture of some structural parts exposed to harsh environments and subjected to certain stresses. For example, in the field of marine engineering, it is used to manufacture some structural parts of offshore platforms, which can effectively resist the erosion of corrosive media such as seawater and long-term stress; in some large outdoor equipment, it can also be used for key structural parts to ensure the stable operation of the equipment in complex environments.
Original Source:https://www.aircraftaluminium.com/a/aluminium-7075-t7351-vs-t73.html
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