Hot work occurs above recrystallization temp; strain hardening does not occur.

• A. It occurs above recrystallization temperature and no strain hardening occurs
• B. It occurs below recrystallization temperature
• C. It occurs only after annealing
• D. It is the same as cold working

Answer: (A)

When metal is deformed above its recrystallization temperature, it can undergo dynamic recrystallization and recovery as it flows. New, strain-free grains form as dislocations are annihilated, so the material doesn’t accumulate the dislocations that cause strain hardening during the deformation. That’s why deformation in hot work is done above the recrystallization temperature and strain hardening does not occur.

This is different from cold working, which happens below the recrystallization temperature and builds up dislocations, increasing strength but reducing ductility. Hot work isn’t defined by post-work processes like annealing, and it’s not the same as cold working.