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The scale of segregation cannot be reduced or avoided by implementing any kind of method.

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in Casting-Forming-Welding I by (687k points)
The scale of segregation cannot be reduced or avoided by implementing any kind of method.

(a) True

(b) False

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Question is from Rate of Solidification in portion Cooling and Solidification of Casting-Forming-Welding I

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The correct answer is (b) False

Explanation: There is very little segregation ahead of dendrite tip because the main partitioning is of solute trapped between the dendrite side arms. The scale of this segregation can be decreased by increasing the solidification rate because the dendrite arm spacing then decreases. Segregation can also be decreased by inducing a greater number density of nuclei.

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