A fracture mechanics study of nodular iron
DOI:
https://doi.org/10.3989/revmetalm.1999.v35.i5.636Keywords:
Fracture toughness, Mechanical properties, Nodular cast iron, Silicon steel, Fracture micromechanismsAbstract
In the present investigation, nodular graphite cast iron fracture toughness with different matrixes and eutectic cell sizes is studied. Properties of tensile strength, hardness and impact toughness are also studied. The experimental data are compared to the same determined parameters in silicon steel with a chemical composition similar to that of the cast iron matrix. A subsequent study of the crack surfaces enables us to establish fracture mechanisms. The joint analysis of the mechanical results and of the fractographic studies allows us to establish the influence of graphite on the different mechanical properties of cast iron and on fracture micromechanisms as well.
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