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Mechanical Properties of Gray Iron - Fracture Toughness

The fracture toughness of a material is a measure of the work required to fracture it. This required work is related to the material's resistance to crack initiation and growth. The work or energy dissipated in fracturing a material is associated with the elastic and plastic deformation of the material and/or crazing (microcracking) that precedes final fracture. The fracture toughness will generally vary with temperature, state of stress and strain-rate, all of which influence the amount of deformation which precedes fracture.

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