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ASM Handbook

Cast Iron Science and Technology

Edited by
Doru M. Stefanescu
Doru M. Stefanescu
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ASM International
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Book Chapter

Metallography and Microstructures of Ductile Irons

George F. Vander Voort
George F. Vander Voort
Struers Inc.
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Juan Asensio-Lozano
Juan Asensio-Lozano
University of Oviedo
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Page range:
645 - 656
Publication history
August 28, 2017


Metallographic techniques for ductile irons are similar to those for other cast irons but more difficult than for steels, because graphite retention is a challenging task. This article presents recommended procedures to prepare ductile irons. It discusses three contemporary approaches for preparing ductile cast iron specimens with a wide range of phases and constituents as well as variations in graphite morphologies. A wide variety of matrix microstructures can be obtained in ductile irons. Examples are presented using a variety of etchants. Control of the nodularity of graphite in ductile irons is critical to their performance. The article presents details concerning the characterization of the graphite nodules.

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George F. Vander Voort, Juan Asensio-Lozano, 2017. "Metallography and Microstructures of Ductile Irons", Cast Iron Science and Technology, Doru M. Stefanescu

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