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Residual stresses in multi-pass butt-welded ferritic-pearlitic steel pipes

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Abstract

This study is dedicated to the investigation of the residual stress development in multi-pass butt-welded joints of ferritic-pearlitic steel pipes. Therefore, temperature profiles are taken during welding, and the residual stresses are determined by X-ray diffraction measurements on the outer and inner surfaces of the pipes. The distortion of the specimens is measured by laser triangulation. In order to identify the influence of the tubular geometry in contrast to a plane one, plates are welded with the same parameters, and the results are compared. The residual stress distributions in both pipes and plates can be explained by phase transformations and thermal contraction. However, it is shown that the latter is the governing mechanism in the residual stress development in the pipes considered in this study, which is due to their distinct geometry.

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Acknowledgments

We would like to thank the German Federation of Industrial Research Associations (AiF) for their financial support of the research project IGF No. 17.619N. This project was carried out under the auspices of AiF and financed within the budget of the Federal Ministry for Economic Affairs and Energy through the program to promote joint industrial research and development (IGF).

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Authors and Affiliations

  1. Institute of Joining and Welding, TU Braunschweig, Langer Kamp 8, 38106, Braunschweig, Germany

    N. Hempel, Th. Nitschke-Pagel & K. Dilger

Authors
  1. N. Hempel
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  2. Th. Nitschke-Pagel
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  3. K. Dilger
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Corresponding author

Correspondence to N. Hempel.

Additional information

Doc. IIW-2542, recommended for publication by Commission X “Structural Performances of Welded Joints — Fracture Avoidance”.

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Hempel, N., Nitschke-Pagel, T. & Dilger, K. Residual stresses in multi-pass butt-welded ferritic-pearlitic steel pipes. Weld World 59, 555–563 (2015). https://doi.org/10.1007/s40194-015-0230-7

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  • DOI: https://doi.org/10.1007/s40194-015-0230-7

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