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Assessment of welded joints stress–strain state inhomogeneity before and after post weld heat treatment based on the metal magnetic memory method

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Abstract

The results of welding specimens’ stress state studies before and after post weld heat treatment (PWHT) based on the metal magnetic memory (MMM) method are presented. The relationship between variation of the welded joint’s stress state and the intensity of the self-magnetic leakage field formed during welding under the action of a weak geomagnetic field is shown. Quick detection of welded joints stress state inhomogeneity zones by the MMM method and assessment of their variation after PWHT is proposed.

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Notes

  1. In Russia, for testing by MMM method, special instruments—TSC (manufacturer Energodiagnostika Co. Ltd.)—were certified by the Federal Agency on Technical Regulating and Metrology (the National Standards Body) of the Russian Federation.

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Authors and Affiliations

  1. Energodiagnostika Co. Ltd, Moscow, Russia

    Sergey Kolokolnikov & Anatoly Dubov

  2. Gubkin Russian State University of Oil and Gas, Moscow, Russia

    Oleg Steklov

Authors
  1. Sergey Kolokolnikov
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  2. Anatoly Dubov
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  3. Oleg Steklov
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Corresponding author

Correspondence to Sergey Kolokolnikov.

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Recommended for publication by Commission V - NDT and Quality Assurance of Welded Products

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Kolokolnikov, S., Dubov, A. & Steklov, O. Assessment of welded joints stress–strain state inhomogeneity before and after post weld heat treatment based on the metal magnetic memory method. Weld World 60, 665–672 (2016). https://doi.org/10.1007/s40194-016-0335-7

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  • DOI: https://doi.org/10.1007/s40194-016-0335-7

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