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The Effect of Notch Tip Position on the Charpy Impact Energy for Bainitic and Martensitic Functionally Graded Steels

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Strength of Materials Aims and scope

Functionally graded steels (FGS) are a group of functionally graded materials with elastic-plastic properties that are recently produced from austenitic stainless steel and carbon ferritic steel via electroslag remelting process. FGSs provide a possible solution to improve the properties of composites including martensitic and bainitic brittle phases. In the present work, keeping into account the relationship between the impact energy and the notch tip plastic zone size, an analytical model has been developed to predict the Charpy impact energy of bainitic and martensitic FGSs. The Charpy impact energy of the FGSs is compared with that of a specimen made of the homogeneous material corresponding to the layer that includes the notch tip. Moreover, three-dimensional finite element method (FEM) simulation of the process has been carried out via ABAQUS software. The material properties of the layers have been obtained considering the Holloman law for the plastic region. Meanwhile, an exponential variations of the material parameters along the specimen width have been considered. The results of the model show a sound agreement with previous results taken from the literature and the FEM results.

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Authors and Affiliations

  1. Composite Center, Malek Ashtar University of Technology, Tehran, Iran

    J. Eskandari Jam

  2. Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran

    M. Abolghasemzadeh, H. Salavati & Y. Alizadeh

Authors
  1. J. Eskandari Jam
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  2. M. Abolghasemzadeh
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  3. H. Salavati
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  4. Y. Alizadeh
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Corresponding author

Correspondence to Y. Alizadeh.

Additional information

Translated from Problemy Prochnosti, No. 5, pp. 140 – 159, September – October, 2014.

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Jam, J.E., Abolghasemzadeh, M., Salavati, H. et al. The Effect of Notch Tip Position on the Charpy Impact Energy for Bainitic and Martensitic Functionally Graded Steels. Strength Mater 46, 700–716 (2014). https://doi.org/10.1007/s11223-014-9604-0

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  • DOI: https://doi.org/10.1007/s11223-014-9604-0

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