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<p>Duplex stainless steel (DSS) plates, 6.35&#xa0;mm thick, were gas metal arc welded (GMAW) with a heat input of ~ 1.4&#xa0;kJ/mm under electromagnetic interaction of low intensity (EMILI) applying electromagnetic fields of 0, 3, 6, 9, 12 and 15 mT. The macrostructural analysis showed that EMILI promotes a ~ 40% reduction in the size of the high&#xa0;temperature heat affected zone (HTHAZ) and an increase of γ-phase content in the weld zone up to 16%. The changes in the microstructure of the welds led to increases on impact toughness at -40&#xa0;°C up to ~ 45% as compared to plain welds. The best results were obtained with EMILI applying 3 mT, with values of 30 and 45&#xa0;J for the root and face of the weld metal (WM), respectively, and 85 in the HTHAZ in comparison with&#xa0; values of 20, 38, and 62&#xa0;J at the same zones, respectively, without EMILI.</p> Graphical abstract <p></p>

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Cryogenic impact toughness of duplex stainless steel welded joints with electromagnetic interaction of low intensity

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • Ventura Lilia Cruz-Hernández,
  • Marco Arturo García-Rentería,
  • Lázaro Abdiel Falcón-Franco,
  • Víctor Hugo López-Morelos,
  • Julio Cesar Verduzco-Juárez

摘要

Duplex stainless steel (DSS) plates, 6.35 mm thick, were gas metal arc welded (GMAW) with a heat input of ~ 1.4 kJ/mm under electromagnetic interaction of low intensity (EMILI) applying electromagnetic fields of 0, 3, 6, 9, 12 and 15 mT. The macrostructural analysis showed that EMILI promotes a ~ 40% reduction in the size of the high temperature heat affected zone (HTHAZ) and an increase of γ-phase content in the weld zone up to 16%. The changes in the microstructure of the welds led to increases on impact toughness at -40 °C up to ~ 45% as compared to plain welds. The best results were obtained with EMILI applying 3 mT, with values of 30 and 45 J for the root and face of the weld metal (WM), respectively, and 85 in the HTHAZ in comparison with  values of 20, 38, and 62 J at the same zones, respectively, without EMILI.

Graphical abstract