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Effect of Boron Content on Hot Ductility and Hot Cracking Susceptibility in 316L Austenitic Stainless Steel for Welding Components

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Abstract

Liquation cracking may occur in the heat-affected zone during welding. Two factors influence this phenomenon: the tensile stresses generated during welding and the potential loss of ductility due to the presence of a liquid film at grain boundaries depending on their chemical composition. Gleeble hot ductility tests have been used to study the combined effect of boron content and holding time on ductility drop in the liquation temperature range of a 316L type austenitic stainless steel. It is shown that high boron contents and short holding times promote the loss of ductility in this temperature range. Secondary ion mass spectrometry has been used to correlate mechanical results to boron distribution either at grain boundaries or in the bulk. Other welding tests have been performed to confirm the influence of boron content on hot cracking sensitivity of AISI 316L stainless steels. Results indicate that cracks appear on all specimens but at different strain levels. The higher the boron content is, the more the specimen exhibits tendency to hot cracking.

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Acknowledgment

The Gleeble 3500 machine of Université Bretagne Sud was co-financed by European Regional Development Fund (ERDF). The authors are grateful to A. Magueresse (Université Bretagne Sud) for the SEM images and to G. Tirand (Areva NP) for the realization of the PVR tests.

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Authors and Affiliations

  1. Univ. Bretagne Sud, UMR CNRS 6027, IRDL, rue de Saint-Maudé, 56100, Lorient, France

    G. Tran Van, D. Carron & P. Le Masson

  2. EDF – R&D, 6 Quai Watier, 78400, Chatou, France

    G. Tran Van & V. Robin

  3. EDF – R&D, Site des Renardières, 77818, Moret sur Loing, France

    A. Andrieu & J. Stodolna

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  1. G. Tran Van
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  2. D. Carron
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  3. P. Le Masson
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  5. A. Andrieu
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  6. J. Stodolna
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Correspondence to G. Tran Van.

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Tran Van, G., Carron, D., Le Masson, P. et al. Effect of Boron Content on Hot Ductility and Hot Cracking Susceptibility in 316L Austenitic Stainless Steel for Welding Components. J. of Materi Eng and Perform 27, 5114–5123 (2018). https://doi.org/10.1007/s11665-018-3640-z

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  • DOI: https://doi.org/10.1007/s11665-018-3640-z

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