Q. The grain boundary area decreases when a polycrystalline material is heated (Solved)
1. below recrystalliza tion temp.
2. above recrystalliza tion temp.
3. above room temp.
4. below 0.5 tm
- b. above recrystalliza tion temp.
1. below recrystalliza tion temp.
2. above recrystalliza tion temp.
3. above room temp.
4. below 0.5 tm