The rapid decrease in tensile strength and increase in ductility of a wrought metal is seen in which stage of annealing ?
Correct answer: B. Recrystallisation stage
- A. Recovery stage
- B. Recrystallisation stage
- C. Grain growth stage
- D. All of the above
Explanation
Recrystallisation replaces the strained, elongated grains with new strain-free grains, causing a sharp fall in tensile strength and a marked rise in ductility. Recovery produces smaller property changes, while grain growth occurs after recrystallisation.
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