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1. Cite the relative Burgers vector-dislocation line orientations for edge, screw, and mixed dislocations.
2. For an FCC single crystal, would you expect the surface energy for a (100) plane to be greater or less than that for a (111) plane? Why? (Note: You may want to consult the solution to Prob- lem 3.53 at the end of Chapter 3.)
3. For a BCC single crystal, would you expect the surface energy for a (100) plane to be greater or less than that for a (110) plane? Why? (Note: You may want to consult the solution to Problem 3.54 at the end of Chapter 3.)
4. (a) For a given material, would you expect the surface energy to be greater than, the same as, or less than the grain boundary energy? Why?
(b) The grain boundary energy of a small- angle grain boundary is less than for a high- angle one. Why is this so?
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