Page 58 - 04. Subyek Engineering Materials - Manufacturing, Engineering and Technology SI 6th Edition - Serope Kalpakjian, Stephen Schmid (2009)

Fundamentals of

Materials: Their

Behavior and

Manufacturing

Properties

Part I of this text begins by describing the behavior and engineering properties of
materials, their manufacturing characteristics, and their applications, as vvell as their
advantages and limitations that would influence their selection in the design and
manufacture of products.
In order to emphasize the importance of the topics to be described, let’s look at
a typical automobile as an example of a common product that utilizes a Wide variety
of materials, as shovvn in Fig. Ll. These materials were selected primarily because,
not only did they possess the desired properties and characteristics for the intended
functions of specific parts, but also they Were the ones that could be manufactured at
the lowest cost.
For example, steel was chosen for much of the body because it is strong, easy
to shape, and inexpensive. Plastics Were used in many components because of char-
acteristics such as light Weight, resistance to corrosion, a wide selection of colors,
and ease of manufacturing into complex shapes and at low cost. Glass was cho-
sen for all the Windows not only because it is transparent, but also because it is

Cast iron or aluminum Steel, aluminum, Plastic bumpers,
engine block or reinforced- dashboards, seats
plastic body
Glass windows

Ceramic
spark plug Plastic taillight
lenses
Copper wiring
Plastic
windshield Tungsten
washer fluid filament for
tank light bulbs

Steel or Lead Steel Stainless
aluminum battery frame steel or
wheels parts Rubber tires aluminum
trim

FIGURE l.I Some of the metallic and nonmetallic materials used in a typical automobile.

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