Dislocation cross-slip is difficult in those materials, which have___________________?
Correct answer: D. Low stacking fault energy
- A. Large number of slip systems
- B. High work hardening rate
- C. Coarse grain size
- D. Low stacking fault energy
Explanation
Cross-slip requires a dislocation to move from one slip plane to another, which is hindered when the stacking-fault energy is low. Low stacking-fault energy keeps the dislocation widely split into partial dislocations.
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