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A dendritic crystal growth structure is formed by the difference in progress of crystallization at different points in the casting material.(a) True(b) FalseI had been asked this question in quiz.I want to ask this question from Mechanism of Solidification topic in portion Cooling and Solidification of Casting-Forming-Welding I

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Right option is (a) True

Best explanation: A dendritic crystal GROWTH STRUCTURE is produced when there is difference in the progress of crystallization that shows completion of crystallization at any POINT before with respect to another point. This is MAINLY caused by very small thermal gradient with a very high concentration difference. Dendritic structure FORMED is looks like as shown in below figure.



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