Hot & cold working of material causes its _______________ deformation?
Correct answer: D. Plastic
- A. Visco-elastic
- B. Isotropic
- C. Elastic
- D. Plastic
Explanation
Working above or below the recrystallisation temperature involves permanent shape change once the applied stress exceeds the yield strength. Permanent shape change is plastic deformation, unlike recoverable elastic deformation.
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