Ceramics in general have very little plastic deformation und

Ceramics in general have very little plastic deformation under loading mainly because Their structures are not crystalline There are very few slip systems in a ceramic The energy needed to overcome the barriers of ions of same charge is too high The mechanical properties of ceramics are generally scattered in large ranges because Usually there are large amount of impurities in ceramics Usually there are large amount of impurities in ceramics There are no dislocations in ceramics Steel wire can be produced by cold drawing processes. A low-carbon steel is used in the process as shown in the figure. As a result of the drawing operation, a (annealed) steel wire of original area of A_o is deformed to a wire with a cross section area A_d. During this process the wire doesn\'t break at the dies although the portion on which the loading is applied has a smaller cross sectional area. The reason that this is possible is When the wire goes through the dies, it\'s strain/work hardened The dies are lubricated to reduce friction The wire is softened by cold drawing What is the main metallurgical difference between a brass and a bronze? In brasses the principal alloying element, zinc, takes substitutional sites, in bronzes the major alloying elements take interstitial sites For brasses, the principal alloying element is zinc, whereas the bronzes are alloyed with other elements such as tin, aluminum, silicon, or nickel. Brasses are shinier than bronzes

Solution

5) B

6) a

7)a

8)a