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As the solidification progresses gradually inwards, small crystals with systematic orientation are formed.

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in Casting-Forming-Welding I by (687k points)
As the solidification progresses gradually inwards, small crystals with systematic orientation are formed.

(a) True

(b) False

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I'm obligated to ask this question of Mechanism of Solidification topic in division Cooling and Solidification of Casting-Forming-Welding I

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Correct option is (b) False

The explanation is: After the starting of solidification of casting material, temperature gradient is set up and by progressing inwards, long columnar crystals are formed with their axes perpendicular to the mould face. This orientation of crystal growth is basically desirable from the point of strength of the castings.

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