Materials in Defence, Aerospace and Mechanical engineering

  • In defense industry, the use of ceramics is mainly as an armour material. As tank armour, alloy steels are the most commonly used materials. Steels of 300 to 400 Brinnel hardness are used where ihin plates can serve the purpose and of 275 to 325 hardness on Brinnel scale are used where thick plates are required. 
  • Standard aerospace aluminums – 6061, 7050, and 7075 – and traditional aerospace metals – nickel 718, titanium 6Al4V, and stainless 15-5PH – still have applications in aerospace. These metals, however, are currently ceding territory to new alloys designed to improve cost and performance. 
  • Mechanical engineering is the study, design, development, construction, and testing of mechanical and thermal sensors and devices, including tools, engines, and machines. ... Mechanical engineers work mostly in engineering services, research and development, and manufacturing.
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