Page 119 - 04. Subyek Engineering Materials - Manufacturing, Engineering and Technology SI 6th Edition - Serope Kalpakjian, Stephen Schmid (2009)

98 Chapter 3 Physical Properties of Materials

BIBLIOGRAPHY

Ashby, M., Materials Selection in Mechanical Design, 3rd Hummel, R.E., Electronic Properties of Materials, 3rd ed.,
ed., Butterworth-Heineman, 2005. Springer, 2004.
ASM Handbook, Vol, 13A: Corrosion: Fundamentals, Pollock, D.D., Physical Properties of Materials for Engineers,
Testing, and Protection, 2003; Vol. 13B: Corrosion 2nd ed., CRC Press, 1993.
Materials, 2005; Vol. 13B: Corrosion: Environments Schweitzer, P.A., Encyclopedia of Corrosion Technology,
and Industries, 2006, ASM International. 3rd ed., Marcel Dekker, 2004.
Cardelli, F., Materials Handbook: A Concise Desk Reference, Solymar, L., and Walsh, D, Electrical Properties of Materials,
2nd ed., Spinger, 2008. Oxford, 2004.

REVIEW QUESTIONS
|]3.|. List several reasons that density is an important 3.6. What is passivation? What is its significance?
material property. 3.7. What is the difference between thermal conductivity
3.2. Explain why the melting point of a material can be an and specific heat?
important factor in material selection. 3.8. Explain stress-corrosion cracking. Why is it also called
3.3. What adverse effects can be caused by thermal expan- season cracking?
sion of materials? Give some examples. 3.9. What is the difference between a superconductor and a
3.4. What is the piezoelectric effect? semiconductor?
3.5. Describe the factors that can lead to the corrosion of a 3.l0. What are smart materials?
metal.

QUALITATIVE PROBLEMS

3.l I. Describe the significance of structures and machine and plastics. Comment on their applications vis-a-vis these
components made of two materials with different coefficients materials.
of thermal expansion. 3.l5. Does corrosion have any beneficial effects? Explain.
3.12. Which of the properties described in this chapter are 3.l6. Explain how thermal conductivity can play a role in
important for (a) pots and pans, (b) cookie sheets for baking, the development of residual stresses in metals.
(c) rulers, (d) paper clips, (e) music wire, and (f) beverage
|]3.| 7. What material properties are desirable for heat
cans? Explain your answers.
shields such as those placed on the space shuttle?
3.l3. Note in Table 3.1 that the properties of the alloys of
metals have a wide range compared with the properties of the 3.18. List examples of products where materials that are
pure metals. Explain why. transparent are desired. List applications for opaque materials.
|l3.l4. Rank the following in order of increasing thermal 3.l9. Refer to Fig. 3.2 and explain why the trends seen are
to be expected.
conductivity: aluminum, copper, silicon, titanium, ceramics,

QUANTITATIVE PROBLEMS

|l3.Z0. If we assume that all the work done in plastic de- 3.2 I. The natural frequency, /Q of a cantilever beam is given by
formation is converted into heat, the temperature rise in a
workpiece is (1) directly proportional to the work done per f= 0.56 EQ,
u/L
unit volume and (2) inversely proportional to the product of where E is the modulus of elasticity, I is the moment of iner-
the specific heat and the density of the workpiece. Using Fig.
tia, g is the gravitational constant, LU is the weight of the
2.6, and letting the areas under the curves be the unit work beam per unit length, and L is the length of the beam. How
done, calculate the temperature rise for (a) 8650 steel, (b) 304 does the natural frequency of the beam change, if at all, as its
stainless steel, and (c) 1100-H14 aluminum.
temperature is increased? Assume that the material is steel,