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<p>The effect of applying an electromagnetic field (EMF) of 3mT during gas metal arc welding of 2205 duplex stainless steel plates, using spray and pulsed arc transfer modes, was studied in terms of microstructure, microhardness maps, and localized corrosion. An ER2209 filler wire was used along with 98%Ar + 2%O<sub>2</sub> to shield the weld pool, and the heat input was ~ 1.1&#xa0;kJ/mm. The microstructural analysis was conducted by optical microscopy to determine γ-phase distribution in the weld zone. Welding with EMF decreased the size of the heat-affected zone. Pulsing the arc led to microstructural refinement, a content of γ-phase close to 50%, and an increase in acicular austenite in the weld metal resulting in higher microhardness values. Intergranular corrosion tests revealed similar values for the welds as compared to the as-received base material. However, the pitting corrosion potential reduced to ~ 150&#xa0;mV in comparison to the base metal using pulsed arc.</p> Graphical abstract <p></p>

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Effect of the electromagnetic interaction of low intensity during welding 2205 duplex stainless steel with different weld metal transfer on the microstructural, mechanical, and electrochemical properties

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • Carla Estefania Contreras-Valdez,
  • Marco Arturo Garcia-Renteria,
  • Ventura Lilia Cruz-Hernández,
  • Víctor Hugo López-Morelos

摘要

The effect of applying an electromagnetic field (EMF) of 3mT during gas metal arc welding of 2205 duplex stainless steel plates, using spray and pulsed arc transfer modes, was studied in terms of microstructure, microhardness maps, and localized corrosion. An ER2209 filler wire was used along with 98%Ar + 2%O2 to shield the weld pool, and the heat input was ~ 1.1 kJ/mm. The microstructural analysis was conducted by optical microscopy to determine γ-phase distribution in the weld zone. Welding with EMF decreased the size of the heat-affected zone. Pulsing the arc led to microstructural refinement, a content of γ-phase close to 50%, and an increase in acicular austenite in the weld metal resulting in higher microhardness values. Intergranular corrosion tests revealed similar values for the welds as compared to the as-received base material. However, the pitting corrosion potential reduced to ~ 150 mV in comparison to the base metal using pulsed arc.

Graphical abstract