Introduction to Materials Science and Engineering انه

 Introduction to Materials Science and Engineering

Introduction to Materials Science and Engineering

One way to appreciate the feld of materials science and Engineering is to look at commercial aviation. A Boeing 777-200 jet can transport 300 passengers /crew and their belongings from San Francisco to Hong Kong (Figure 1.1) in 14 hours, consuming about 7 tons of jet fuel per hour while at cruise. Aeronautical engineers design the Boeing 777 to be aerodynamically effcient. Electrical engineers design and build sophisticated avionics so that the 777 can fy itself from takeoff to touchdown.

Who are the people designing and developing materials for the powerful engines,the streamlined and pressurized fuselage, and fexible yet strong wings and control surfaces? You guess right – materials scientists and engineers! In fact, high-strength lightweight aluminum alloys account for 50% by weight of the materials in the 777.

If all these aluminum parts were replaced by steels without redesign, the Boeing 777 would likely be 100 tons heavier – clearly not a commercially viable proposition.

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