Conclusions
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1.
The effect of spheroidal graphite inclusions on the failure of ferritic cast iron depends on the condition of the matrix: in a ductile matrix spheroidal graphite particles are centers of microcavity generation and they lead as a result of this to a reduction in the level of cast iron properties; in a brittle matrix graphite particles have a favorable tendency of retarding brittle crack development and under certain conditions they lead to a change in failure mechanism.
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2.
The effect of crack retardation at spheroidal graphite particles develops particularly clearly at low loading rates thus providing properties in cast iron comparable with steel.
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Literature cited
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Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 17–20, April, 1989.
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Smirnova, L.N., Shcheglyuk, N.I. Features of failure for ferritic cast iron with spheroidal graphite. Met Sci Heat Treat 31, 255–258 (1989). https://doi.org/10.1007/BF00715797
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DOI: https://doi.org/10.1007/BF00715797