Strain hardening effect in metals subjected to cold working is due to the _______________ mechanism?
Correct answer: D. Dislocation
- A. Slip
- B. Fracture
- C. Winning
- D. Dislocation
Explanation
Cold working increases strength because dislocations multiply and impede one another’s movement, making further plastic deformation harder. Slip is the deformation mechanism, but dislocation interactions cause the hardening.
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