5000 series deformed aluminum alloy automobile sheets are mainly strengthened by solid solution strengthening and fine grain strengthening of magnesium atoms and a small amount of solid solution and precipitation strengthening of copper atoms. This series of alloys has good formability.
When left at room temperature, the yield point is prone to prolongation (or lüders elongation), and the surface is prone to wrinkles after stamping, which affects the appearance quality of the product. The increase of iron element will significantly worsen its ductility and cold bending performance; due to the lack of bake hardening, the paint will easily soften after baking, thus affecting the dent resistance of the parts.
6000 series automotive aluminum sheets use silicon and magnesium as the main alloying elements (copper is also added as an alloying element in the 6111 alloy). This type of alloy relies on the precipitation strengthening of silicon and magnesium during solid solution aging as the main strengthening method. It can be heat treated and strengthened.
This type of aluminum alloy sheet has good formability in the pre-processed state and no yield point elongation. It is suitable for automobile exterior panels, and has bake hardening properties. It has high flow stress after the paint is baked, and the parts have high dent resistance; however, aging will lead to a decrease in flanging ductility and deterioration in formability.
Currently, the most commonly used aluminum alloy plates for cars are AA6016, AA6022, AA6111, AA6005, AA6009 and AA6010, AA5182, AA5754, AA5052, etc. The Audi A8 car uses 6016 alloy plates as the body panel, the Acura NSX car uses 5052 as the interior panel and the 6000 series as the exterior panel. The Jaguar XJ220 car and the GM EV1 car both use 5754 as the body covering material.
After searching the existing technology, it was found that the aluminum alloy inner panels used in automobiles are mainly 5xxx series alloys, such as 5052, 5182 alloys, etc. In terms of deep drawing performance and tensile strength, 5052 aluminum alloy is far less good than 5182 alloy. 5052 aluminum thickness for cars is not too thick.
The batteries that provide driving power for electric vehicles are called power batteries, including traditional lead-acid batteries, nickel-metal hydride batteries, and emerging lithium-ion power batteries. Currently, the world is promoting lightweight vehicles, and aluminum is a better choice. 3003 aluminum sheet is used for this aspect.
3003 h14 aluminum sheet has good formability and is mainly used as deep drawing materials. Using 3003 aluminum alloy products to make stamped parts, models, shells, etc. has many advantages such as good surface, good plasticity, and pressure resistance.
Original Source:https://www.autoaluminumsheet.com/a/3003-and-5052-aluminum-alloy-in-automobile-manufacturing.html
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