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Effect of High-Temperature Exposure on Low-Carbon Steel Welded Joint Metal Fracture Toughness

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Metallurgist Aims and scope

Comparative testing for crack resistance (fracture toughness) of weld metal specimens of a low-carbon steel welded joint in the as-supplied condition and after high-temperature exposure at a temperature of 1200 °C for 3.7 hours is conducted. A welded joint is obtained by automatic argon-arc welding with a consumable electrode in a hot-rolled 22K-type steel sheet of 60 mm thick using welding wire grade SV-08G2S. Tests for static crack resistance of specimens with a stress concentrator are carried out according to a three-point bending scheme. One of the energy criteria of nonlinear fracture mechanics, critical J-integral [J/m2], which takes into account plastic deformation at a crack tip, is used as a crack resistance characteristic. It is shown that high-temperature exposure leads to an increase in crack resistance (the J-integral value increases by two times) as a result of phase recrystallization and improving the coarse-grained overheated weld structure.

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Authors and Affiliations

  1. National University of Science and Technology MISIS, Moscow, Russia

    S. A. Nikulin, S. O. Rogachev, V. A. Belov, N. V. Shplis, V. Yu. Turilina, L. V. Fedorenko & D. Yu. Ozherelkov

  2. Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences, Moscow, Russia

    S. O. Rogachev

  3. Research and Development Center TMK (TMK R&D), Moscow, Russia

    A. V. Molyarov

Authors
  1. S. A. Nikulin
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  2. S. O. Rogachev
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  3. V. A. Belov
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  4. N. V. Shplis
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  5. V. Yu. Turilina
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  6. L. V. Fedorenko
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  7. A. V. Molyarov
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  8. D. Yu. Ozherelkov
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Correspondence to S. A. Nikulin.

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Translated from Metallurg, Vol. 67, No. 7, pp. 40–45, July, 2023.

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Nikulin, S.A., Rogachev, S.O., Belov, V.A. et al. Effect of High-Temperature Exposure on Low-Carbon Steel Welded Joint Metal Fracture Toughness. Metallurgist 67, 938–946 (2023). https://doi.org/10.1007/s11015-023-01583-4

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  • DOI: https://doi.org/10.1007/s11015-023-01583-4

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