HWCH8Spring

# HWCH8Spring - IE 320 Spring 2003 Homework Ch 8 Introduction...

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Homework Ch. 8 2 Introduction to Materials Science 8.5 (7.5) (a) Define a slip system. (b) Do all metals have the same slip system? Why or why not? 8.6 (7.6) (a) Compare planar densities for the (100), (110), and (111) planes for FCC. (b) Compare planar densities for the (100), (110), and (111) planes for BCC. 8.18 (7.18) Describe in your own words the three strengthening mechanisms discussed in this chapter (i.e., grain size reduction, solid Solution strengthening, and strain hardening). Be sure to explain how dislocations are involved in each of the strengthening techniques. .

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3 Introduction to Materials Science 8.19 (a) From the plot of yield strength versus (grain diameter) - 1/2 for a 70 Cu–30 Zn cartridge brass, Figure 8.15, determine values for the constants σ 0 and k y in Equation 8.5. (b) Now predict the yield strength of this alloy when the average grain diameter is 1.0 x10 -3 mm. -1/2 y y 0 = + d k σ σ 4 Introduction to Materials Science
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