**4.1 Aerospace applications**

Magnesium alloys were extensively used in aerospace in world war I and world war II. The united states air force's bombers B-36 and B52 contain a large amount of magnesium in casting, forging, and extrusion. The B-36 uses magnesium alloys ranging from 66 lb. to 12200 lbs. in different forms like sheets, castings, and extrusion. The Boeing 727 aeroplanes contain 12 parts, including control surfaces, wheels, engine gearbox, structural items, door frames, and edge flaps are made of magnesium alloys. Soviet air crafty industry, including the TU-95MS plane and TU-134, are using magnesium alloys up to 780Kg at different locations [13]. The International Air Transport Association (IATA) legislation has limited the magnesium application due to magnesium alloys' higher corrosion performance. Some of the commonly used alloys and their applications are mentioned in **Table 2**. It is expected that magnesium will be a major element in a future world in structural materials in aerospace.
