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Low-Cycle Fatigue of the Weld Metal of a Low-Carbon Steel Welded Joint after High-Temperature Action

  • APPLIED PROBLEMS OF STRENGTH AND PLASTICITY
  • Published:
Russian Metallurgy (Metally) Aims and scope

Abstract

Dynamic mechanical analysis is used to perform comparative low-cycle fatigue tests according to the scheme of bending the weld metal of a low-carbon steel 22K welded joint after a high-temperature action according to the following schedule: holding at 1200°C for 3.7 h followed by slow cooling. The weld metal in the initial state is shown to be characterized by low-cycle fatigue high resistance: the fatigue limit for finite life at N = 3.5 × 104 cycles is σRN = 340 MPa. The high-temperature action additionally increases σRN by 23%. The influence of the microstructure of the weld on the fatigue strength characteristics and fracture mechanisms is analyzed.

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Funding

This work was supported by Moscow Polytechnic University within the framework of the P.L. Kapitsa grant program.

The structural investigations were carried out on the equipment of the Materials Science and Metallurgy core facility of the National University of Science and Technology MISiS and supported by the Ministry of Science and Higher Education of the Russian Federation (project no. 075-15-2021-696).

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Authors and Affiliations

  1. National University of Science and Technology MISiS, 119049, Moscow, Russia

    S. A. Nikulin, S. O. Rogachev, V. A. Belov, N. V. Shplis & M. Yu. Zadorozhnyi

  2. Moscow Polytechnic University, 107023, Moscow, Russia

    M. Yu. Zadorozhnyi

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. M. Yu. Zadorozhnyi
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Corresponding author

Correspondence to S. O. Rogachev.

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The authors of this work declare that they have no conflicts of interest.

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Translated by K. Shakhlevich

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Nikulin, S.A., Rogachev, S.O., Belov, V.A. et al. Low-Cycle Fatigue of the Weld Metal of a Low-Carbon Steel Welded Joint after High-Temperature Action. Russ. Metall. 2023, 1501–1509 (2023). https://doi.org/10.1134/S0036029523100257

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  • DOI: https://doi.org/10.1134/S0036029523100257

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