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The presence of solid crystals at solid-liquid interface makes feeding of molten metal more easily.

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in Casting-Forming-Welding I by (687k points)
The presence of solid crystals at solid-liquid interface makes feeding of molten metal more easily.

(a) True

(b) False

This question was addressed to me in a national level competition.

Query is from Mechanism of Solidification in section Cooling and Solidification of Casting-Forming-Welding I

1 Answer

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Best answer
Right choice is (b) False

The explanation: The presence of solid crystals ahead of the solid-liquid interface does not make easy feeding, even this makes more difficult to feed the liquid metal. This basically implies a greater risk of having voids within the casting which is normally referred to as centre-line shrinkage defect.

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