Basic characteristics of aerospace aluminium alloys for sale Haomei

The main characteristics of aerospace aluminium alloys are: large size and integration, thin wall and light weight, precision of section size and shape tolerance, uniformity and quality of tissue performance. According to the different conditions of use and parts of the aircraft, the aluminium alloys for aerospace are mainly high-strength aluminium alloys, heat-resistant aluminium alloys and corrosion-resistant aluminium alloys. High-strength aluminium alloys are mainly used in aircraft fuselage parts, engine compartments, seats and manoeuvring systems, etc., and are the most widely used.

The most important feature of aerospace aluminium alloys is that the strength can be increased by deformation heat treatment. Deformation heat treatment is a comprehensive process that combines the deformation strengthening of plastic deformation and the phase change strengthening during heat treatment, so that the forming process and the forming performance are unified. During the plastic deformation of aircraft aluminium alloys, the density of defects inside the crystals increases and these crystal defects trigger changes in the internal microstructure of the material. During the process of plastic deformation of aerospace aluminium alloys, changes in the crystal structure such as dynamic reversion, dynamic recrystallisation, sub-dynamic in-crystallisation, static recrystallisation and static reversion occur. These changes in crystal structure, if properly controlled, will significantly improve the mechanical properties and enhance the service life of the material.

Aerospace aluminium alloys are generally strengthened by the precipitation of diffuse phases in supersaturated solid solutions. The general precipitation sequence is: deviatoric zone (or GP zone) ~ transition phase (sub-stable phase) ~ equilibrium phase. In the process of deformation heat treatment, deformation induces precipitation, precipitation affects deformation, and deformation and precipitation affect each other and dynamically influence the properties of the material.

The precipitation strengthening process of deformation heat treatment is greatly influenced by temperature. Deformation heat treatment can be divided into high temperature deformation heat treatment and low temperature deformation heat treatment. The basic process of low temperature deformation heat treatment is: quenching, room temperature cold deformation and ageing heat treatment of aviation aluminium alloys. After this treatment, the strength of the aviation aluminium alloy is greatly improved, but the plasticity is reduced. The high temperature deformation heat treatment process is: quenching, high temperature deformation and ageing. After the high temperature deformation heat treatment, the material strength is higher, plasticity and toughness are improved, and the heat resistance strength of the alloy will also reach an increase.