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      Fluidity Test

    A test method for uidity using a spiral mold The fuidity  index  is the length of the solidi!ed metal in the spiral passage Thegreater the length of the solidi!ed metal, the greater is itsuidity

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    $hrin*age

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    $olidi!ation 'ontration or %-pansion

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    /asi Types of 'ast $trutures

    Figure: $hemati illustration of three basi types of ast strutures: aolumnar dendriti b e3ui4-ed dendriti and e3uia-ed nondendritiSource: 'ourtesy of Apelian

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    'hill, olumnar and e3ui7a-ial grains

    Sketch of solidied grain structure of an alloy: (a) chill crystals;(b) columnar grains; and (c) region of coarse equiaxed grains in

    centre.

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    Furnae

    1 %letri ar furnae

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    Furnae ont9d

    2 -ygen Lane Furnae

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    Furnae ont9d

    ( ;ndution Furnae

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    Furnae ont9d

    ) %letri Furnae