Results (
Arabic) 1:
[Copy]Copied!
regard to mechanical characteristics, these materials are relatively stiff (Figure 1.4)and strong yet are ductile (i.e., capable of large amounts of deformationwithout fracture), and are resistant to fracture , which accounts for theirwidespread use in structural applications. Metallic materials have large numbers ofnonlocalized electrons; that is, these electrons are not bound to particular atoms.Manyproperties of metals are directly attributable to these electrons. For example, metalsare extremely good conductors of electricity and heat, and are not trans-parent to visible light; a polished metal surface has a lustrous appearance. In addi-tion, some of the metals (viz., Fe, Co, and Ni) have desirable magnetic properties.Figure 1.8 is a photograph that shows several common and familiar objects thatare made of metallic materials. Furthermore, the types and applications of metals
Being translated, please wait..