Nodules in spheroidal cast iron

Q.  Nodules of graphite are observed in the microstructure of _______
- Published on 11 Sep 15

a. white cast iron
b. malleable cast iron
c. spheroidal cast iron
d. all of the above

ANSWER: spheroidal cast iron

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    Discussion

  • Sravanthi   -Posted on 21 Nov 15
    Microstructure: It is defined as the structure of material which is revealed by a microscope above 25 x magnification and also called as the small scale structure of a material.

    - Microstructures of malleable cast iron show rosettes of tempered carbon in the matrix of ferrite.

    - Microstructures of spheroidal cast iron have nodules of graphite.

    - Microstructures of white cast iron show dendrites of pearlite and the remaining part is cementite.

    - Microstructures of gray cast iron show graphite flakes.

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