Engineering Questions with Answers - Multiple Choice Questions

Manufacturing Processes – Annealing – 10

1 - Question

Temperature dependence of the grain-growth can be explained by ______
a) recrystallization theory
b) planks theory
c) assuming that grain boundaries brake due to thermal vibrations
d) strain energy theory
View Answer Answer: c
Explanation: The temperature dependence of the grain-growth exponent can be explained by assuming that the grain-boundary solute atmospheres are broken up by thermal vibrations at high temperatures. Those elements that distort the lattice structure the most have the largest effect on the rate of grain growth.

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