Using some external resources explain the compositional diff

Using some external resources, explain the compositional differences between 7075 and 7475 aluminium alloys. Which alloy is stronger? Which is tougher? Make sure you provide some references.

Solution

7076 is one of the highest strength, commercially available alloys with fair corrosion resistance and machinability. Low workability rating and welded only by resistance process. Typically used for aircraft skins, cowls and structures. This alloy offers the highest strength of the common screw machine alloys. The superior stress corrosion resistance of the T73 and T7351 tempers makes it a logical replacement for 2024, 2014 and 2017 in many of the most critical applications. The T6 and T651 tempers have fair machinability, resistance welding and corrosion resistance ratings. This alloy is heavily utilized by the aircraft and ordnance industries because of its superior strength.

  Basically, high purity versions of 7075 with tighter control on the iron and silicon for an increase in strength and toughness. Primarily used in the aircraft industry. This alloy is heavily utilized by the aircraft and ordnance industries because of its superior strength.

7075 form of alloy is more tougher and stronger.

Reference:

http://aviationmetals.net/products/item/321