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Using Speckle Images for Determining the Local Plastic Strains Arising at High-Cycle Fatigue of 09G2S Steel

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Abstract

Plastic strains arising in the zone of fatigue crack initiation are estimated with the aid of time-averaged speckle images on a sample of 09G2S steel with two grooves 2.5 mm in radius. It is shown that the fatigue fracture appears owing to localization of irreversible processes in the region less than 1 mm and the limit value of tension plastic strains is on the order of 10–1. As an indication of fracture, it is proposed to use the fact that the normed temporal autocorrelation function of radiation intensity reduces to a negative value.

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ACKNOWLEDGMENTS

The authors thank I.S. Kamantsev for aid in performing experiments.

Funding

The work was partially supported by Decree 211 of the Russian Government, agreement no. 02.A03.21.0006.

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Authors and Affiliations

  1. Institute of Engineering Science, Ural Branch, Russian Academy of Sciences, 620049, Yekaterinburg, Russia

    A. P. Vladimirov & N. A. Drukarenko

  2. Ural Federal University, 620002, Yekaterinburg, Russia

    A. P. Vladimirov & K. E. Myznov

Authors
  1. A. P. Vladimirov
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  2. N. A. Drukarenko
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  3. K. E. Myznov
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Correspondence to A. P. Vladimirov.

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Vladimirov, A.P., Drukarenko, N.A. & Myznov, K.E. Using Speckle Images for Determining the Local Plastic Strains Arising at High-Cycle Fatigue of 09G2S Steel. Tech. Phys. Lett. 47, 777–780 (2021). https://doi.org/10.1134/S1063785021080137

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  • DOI: https://doi.org/10.1134/S1063785021080137

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