Question:
Driving force for grain growth after completion of recrystallisation is
Driving force for grain growth after completion of recrystallisation is
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Recrystallization is driven by Stored Energy; Grain Growth is driven by Boundary Energy.
Updated On: Jul 4, 2026
- Grain boundary energy
- Dislocation density
- Vacancy concentration
- Stored energy
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Grain growth is a process that occurs after recrystallization to further reduce the energy of the material system.
Step 2: Meaning
During recrystallization, stored energy from dislocations is removed. Once complete, the system still possesses energy associated with the total area of grain boundaries.
Step 3: Analysis
Large grains have a lower surface-to-volume ratio than small grains. The system naturally trends toward larger grains to minimize the total grain boundary energy.
Step 4: Conclusion
Thus, grain boundary energy is the primary driving force for grain growth once the stored energy of deformation has been exhausted. Final Answer: (A)
Grain growth is a process that occurs after recrystallization to further reduce the energy of the material system.
Step 2: Meaning
During recrystallization, stored energy from dislocations is removed. Once complete, the system still possesses energy associated with the total area of grain boundaries.
Step 3: Analysis
Large grains have a lower surface-to-volume ratio than small grains. The system naturally trends toward larger grains to minimize the total grain boundary energy.
Step 4: Conclusion
Thus, grain boundary energy is the primary driving force for grain growth once the stored energy of deformation has been exhausted. Final Answer: (A)
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