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The relationship between microstructure and the J-R curve

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Abstract

A model is presented that establishes a quantitative relationship between the J IC and the J-R curve and the microstructural parameters, such as inclusion size and spacing, and the plastic deformation properties of ductile materials, such as yield strength and strain hardening exponents. The model assumes that ductile crack growth occurs by void nucleation, growth, and coalescence. Each of these processes is modeled in the crack tip environment to complete the model. The proposed model is evaluated using tests performed on 303 stainless steel (SS) at room temperature and on 1Cr-Mo-0.25V steel at 565 °C. Satisfactory agreements are obtained between the experimentally obtained J-R curves and those predicted from the model. Limitations of the model are also discussed.

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Authors and Affiliations

  1. the School of Materials Science and Engineering, Georgia Institute of Technology, 30332-0245, Atlanta, GA

    Ashok Saxena (Professor and Chair) & Laurent Cretegny (Graduate Research Assistant)

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  1. Ashok Saxena
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  2. Laurent Cretegny
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Saxena, A., Cretegny, L. The relationship between microstructure and the J-R curve. Metall Mater Trans A 29, 1917–1922 (1998). https://doi.org/10.1007/s11661-998-0016-2

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  • DOI: https://doi.org/10.1007/s11661-998-0016-2

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