Question:
Prolonged Annealing of steel results in
Prolonged Annealing of steel results in
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Time + Temperature = Grain Growth. Always control the soaking time to maintain a fine-grained structure.
Updated On: Jul 4, 2026
- Decrease in ductility
- Increase in Strength
- High Hardness
- Grain Growth
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The Correct Option is D
Solution and Explanation
Step 1: Concept Annealing is a heat treatment process that involves heating a material above its critical temperature and holding it there.
Step 2: Meaning Maintaining a high temperature for an extended duration provides the thermal energy required for atoms to rearrange and boundaries to migrate.
Step 3: Analysis While standard annealing improves ductility and reduces hardness, keeping the steel at temperature for too long leads to the merging of smaller grains into larger ones.
Step 4: Conclusion Therefore, prolonged exposure during annealing primarily results in grain growth, which can eventually degrade mechanical properties. Final Answer: (D)
Step 2: Meaning Maintaining a high temperature for an extended duration provides the thermal energy required for atoms to rearrange and boundaries to migrate.
Step 3: Analysis While standard annealing improves ductility and reduces hardness, keeping the steel at temperature for too long leads to the merging of smaller grains into larger ones.
Step 4: Conclusion Therefore, prolonged exposure during annealing primarily results in grain growth, which can eventually degrade mechanical properties. Final Answer: (D)
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