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Identification of a heat source model for multipass narrow groove GMA welding process

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Abstract

The use of narrow gap for thick component welding as applied in nuclear industries and especially by AREVA NP, requires the mastering of several parameters and especially shrinkage. The prediction through to numerical simulation is very helpful for welding procedure definition. This paper describes an approach used to determine a 3D heat source dedicated to a new industrial welding process configuration (deep narrow groove multipass low-carbon steel gas metal arc (GMA) welding, two passes per layer) to assess the groove shrinkage which occurs during welding by numerical simulation. Parameters of this 3D heat source are identified by solving an inverse heat conduction problem by a least square method. A multiobjective optimization is performed with a new proposed metric (Hausdorff distance) in the objective function (sum of square) in order to simulate relevant bead shape and temperatures in the solid zone. Finally, the identified 3D heat source model is a combination of two volumetric heat sources containing five parameters each. It can be used as thermal loading for subsequent thermal metallurgical mechanical calculations.

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Authors and Affiliations

  1. CEA, DEN, DM2S, F-91191, Gif-sur-Yvette, France

    Olivier Asserin & Danièle Ayrault

  2. AREVA NP, Tour AREVA, 1 place Jean Millier, 92400, Courbevoie, France

    Philippe Gilles

  3. AREVA NP, Technical Center, BP 40001 Saint Marcel, 71328, Chalon sur Saône, France

    Evelyne Guyot & Jeanne Schroeder

Authors
  1. Olivier Asserin
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  2. Danièle Ayrault
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  3. Philippe Gilles
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  4. Evelyne Guyot
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  5. Jeanne Schroeder
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Corresponding author

Correspondence to Olivier Asserin.

Additional information

Doc. IIW-2425, recommended for publication by Commission XII “Arc Welding Processes and Production Systems”.

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Asserin, O., Ayrault, D., Gilles, P. et al. Identification of a heat source model for multipass narrow groove GMA welding process. Weld World 58, 161–169 (2014). https://doi.org/10.1007/s40194-013-0109-4

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  • DOI: https://doi.org/10.1007/s40194-013-0109-4

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