GTBL042-13 GTBL042-Callister-v2 August 29, 2007 8:52

Chapter 13 Types and Applications

of Materials

Photograph of several billiard balls that are made of phenol-formaldehyde (Bakelite). The Materials of Importance piece that

follows Section 13.12 discusses the invention of phenol-formaldehyde and its replacement of ivory for billiard balls. (Photography

by S. Tanner.)

WHY STUDYTypes and Applications of Materials?

Engineers are often involved in materials selection

decisions, which necessitates that they have some

familiarity with the general characteristics of a wide

variety of materials. In addition, access to data bases

containing property values for a large number of

materials may be required. For example, in Sections M.4

through M.6 of Web Module M we discuss a materials

selection process applied to a cylindrical shaft that is

stressed in torsion.

516 •