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Expert-1 Handheld LIBS Analyzer in Application of Aluminum Alloy
2020 09 14

Expert-1 Handheld LIBS Analyzer in Application of Aluminum Alloy

Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and it has been widely used in aviation, aerospace, automobile, machinery, manufacturing, shipbuilding and chemical industries. With the rapid development of industrial economy, the demand for aluminum alloy welded structural parts is increasing, and the weldability research of aluminum alloy is also in-depth.

Aluminum alloys usually use alloying elements such as copper, zinc, manganese, silicon, and magnesium. The alloy formed by adding certain elements to the laser handheld spectrometer can maintain the advantages of pure aluminum and light weight, while also having higher strength.  σb value can reach 24~60kgf/mm2 respectively.

This makes its “specific strength”( the ratio of strength to specific gravity σb/ρ) better than many alloy steels. It becomes an ideal structural material and is widely used in machinery manufacturing, transportation machinery, power machinery and aviation industry, the fuselage, skin, compressor, etc. of the aircraft are often made of aluminum alloy to reduce their own weight. It uses aluminum alloy instead f steel plate material welding, and the structural weight can be reduced by more than 50%.

Aluminum alloy has low density but relatively high strength, which is close to or exceeds that of high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry and its usage is second only to steel.

Aluminum alloys can be divided into deformable aluminum alloys and cast aluminum alloys according to processing methods:

Deformed aluminum alloy can withstand pressure processing. It can be process into various shapes and specifications of aluminum alloy. It is mainly used to manufacture aviation equipment, doors and windows for construction, etc. The deformable aluminum alloys are divided into non-heat treatable reinforced aluminum alloys and heat treatable reinforced aluminum alloys. The non-heat-treatable strengthened type cannot improve the mechanical properties through heat treatment, but can only be strengthened by cold working deformation, it mainly includes high-purity aluminum, industrial high-purity aluminum, industrial pure aluminum, and anti-rust aluminum. It can be heat-treated and strengthened aluminum alloy can be quenched and aging heat treatment to improve the mechanical properties, it can be divided into hard aluminum, forged aluminum, super-hard aluminum and special aluminum alloy, etc.

Cast aluminum alloy can be divided into aluminum silicon alloy, aluminum copper, alloy, aluminum magnesium alloy, aluminum zinc alloy and aluminum rare earth alloy according to chemical composition, among them, aluminum-silicon alloys include hypereutectic silicon-aluminum alloys, eutectic silicon-aluminum alloys, mono-eutectic silicon-aluminum alloys, and cast aluminum alloys are used in the as-cast state.

Some aluminum alloys can be heat treated to obtain good mechanical properties, physical properties and corrosion resistance.

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All kinds of aircraft use aluminum alloy as the main structural material.The skins, beams, ribs, stringers, bulkheads and landing gear on the aircraft can all be made of aluminum alloy. The civil aircraft that focus on economic benefits are widely used because of the low price of aluminum alloy. For example, the aluminum alloy used in the Boeing 767 passenger aircraft accounts for about 81% of the weight of the aircraft structure. Military aircraft require good combat performance and relatively reduce the amount of aluminum. For example, the F-15 high-performance fighter with a maximum flight speed of Mach 2.5 uses only 35.5% aluminum alloy. Some aluminum alloys have good low temperature properties and can work in liquid hydrogen and liquid oxygen environments. They do not react chemically with concentrated nitric acid and unsymmetrical dimethylhydrazine, and have good welding properties, so they are good materials for liquid rockets. The fuel tanks, oxidizer thanks, inter-chambers, inter-stages, tail sections, and instrument compartments of the Saturn 5 carrier rocket that launched the Apollo spacecraft are all made of aluminum alloy.

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