Cold working of a material results in increase in hardness, which is termed as the ______________ hardening ?
Correct answer: B. Work
- A. Cold
- B. Work
- C. Age
- D. Induction
Explanation
Plastic deformation during cold working increases dislocation density, making further deformation more difficult and increasing hardness. This strengthening effect is called work hardening, also known as strain hardening.
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