STP1220

    Prediction of Cleavage Fracture Probability for Ferritic Steels in the Transition Region

    Published: Jan 1995


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    Abstract

    A method is described for modelling the stochastic variability of toughness data for ferritic steels in the brittle to ductile transition regime. The present model is based on two ingredients: a weakest link approach using Weibull statistics with a suitable modification to include the effect of ductile tearing, and an accurate expression of the material J-R curve, determined from fractography. The model provides a rationale for the different fracture behaviour of a material over the whole range of temperature, from fully stable J-R behaviour at high temperature down to brittle fracture under LEFM conditions at low temperature.

    Keywords:

    fracture toughness, cleavage, J-R curve, ductile fracture, transition, tearing, steels, statistics


    Author Information:

    Bicego, V
    Head of Material Mechanics Section, Assistant to Head of Mat. Mechs. Sect., and Scientific Ass. to Head of Microstructure Sect., CISE SpA, Milan,

    Elli, A
    Head of Material Mechanics Section, Assistant to Head of Mat. Mechs. Sect., and Scientific Ass. to Head of Microstructure Sect., CISE SpA, Milan,

    Rinaldi, C
    Head of Material Mechanics Section, Assistant to Head of Mat. Mechs. Sect., and Scientific Ass. to Head of Microstructure Sect., CISE SpA, Milan,


    Paper ID: STP14609S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP14609S


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