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Aluminum–lithium alloys 2090/2091/8090/8192
Aluminum alloys have low density but relatively high strength, comparable to or even exceeding that of high-quality steels. They exhibit good ductility and can be readily formed into a wide variety of profiles.
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Aluminum–lithium alloys 2090/2091/8090/8192
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Characteristics and Applications of Aluminum Alloys
1. Low density, high strength, corrosion-resistant, and aesthetically pleasing
2. Easy to dissipate heat, easy to form, easy to process, and highly conductive.
3. Non-magnetic, easy to process, enhanced reflectivity, and a wide range of surface colors, among other features.
Aluminum alloys possess sufficient strength; ultra‑high‑strength aluminum alloys can achieve a strength of up to 600 MPa, while conventional hard aluminum alloys exhibit tensile strengths ranging from 200 to 450 MPa. Consequently, they are widely employed in mechanical engineering.
Different aluminum alloys exhibit distinct properties.
Aluminum alloys have low density but relatively high strength, comparable to or even exceeding that of high‑quality steels. They exhibit good ductility and can be readily formed into various profiles. Moreover, they possess excellent electrical and thermal conductivity as well as outstanding corrosion resistance, making them widely used in industry—second only to steel in terms of consumption. Certain aluminum alloys can be heat‑treated to achieve superior mechanical properties, physical characteristics, and corrosion resistance. Hard aluminum alloys belong to the Al–Cu–Mg system, typically containing small amounts of Mn, and are capable of age hardening. They are characterized by high hardness but poor ductility. Ultra‑hard aluminum alloys are based on the Al–Cu–Mg–Zn system; they can also be strengthened through heat treatment and offer the highest room‑temperature strength among aluminum alloys. However, they suffer from poor corrosion resistance and rapid softening at elevated temperatures. Forged aluminum alloys are primarily Al–Zn–Mg–Si systems. Despite the presence of numerous alloying elements, their concentrations are generally low, resulting in excellent hot workability and suitability for forging; hence, they are also referred to as forged aluminum alloys.
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