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The shear mode of ductile fracture in a spheroidized steel

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Abstract

The shear mode of ductile fracture has been investigated in a spheroidized plain carbon steel by optical microscopy, scanning electron microscopy and transmission electron microscopy. The results from these techniques are brought together to obtain a detailed description of the shear mode of fracture in this material. The fracture occurs by the following sequence: first, voids form at nonmetallic inclusions, then the deformation becomes localized into a shear zone. Finally, cracks develop due to the nucleation, growth and coalescence of voids at carbide/matrix interfaces within the shear zone. The TEM observations show that the material near the fracture edge consists of an elongated cell substructure. The measured shear strain to fracture is found to be lower than that predicted by the mathematical model derived by McClintocket al.

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Authors and Affiliations

  1. Council for Scientific and Industrial Research Organisation, 5011, Woodville, S. Aust, Australia

    I. E. French & P. F. Weinrich

Authors
  1. I. E. French
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  2. P. F. Weinrich
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formerly with the Materials Research Laboratories, Defence Science and Technology Organisation, Melbourne, 3032, Australia

former organization.

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French, I.E., Weinrich, P.F. The shear mode of ductile fracture in a spheroidized steel. Metall Trans A 10, 297–304 (1979). https://doi.org/10.1007/BF02658337

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  • DOI: https://doi.org/10.1007/BF02658337

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