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<p>AISI 347 stainless steel plates (7&#xa0;mm thick) were gas metal arc welded (GMAW) in both the as-received (hot-rolled) and solution heat-treated (SHT) conditions using ER-308 filler wire. The welding process was performed with and without the application of a 3-mT external electromagnetic field (EMF). Microstructural characterization showed that using EMF reduced the size of the heat-affected zone (HAZ) and resulted in more uniform microhardness values across the transverse section of the welded joint. Intergranular corrosion and resistance to pitting corrosion (RPC) were evaluated in a solution of 1&#xa0;M H<sub>2</sub>SO<sub>4</sub> + 0.5&#xa0;M HCl and a 3.5% NaCl solution, respectively. These results correlated well with the microstructural findings since low degrees of sensitization (DOS), similar to those of the base metal, were observed in the samples welded with EMF. Similarly, RPC&#xa0;showed that the EMF significantly improved this property, doubling the resistance with respect to samples plainly welded.</p> Graphical Abstract <p></p>

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Effect of the metallurgical condition of 347 stainless steel welded plates under electromagnetic fields on the corrosion resistance and the mechanical properties

  • 期刊论文

  • 发表日期：

    2025年6月11日

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  • Clarisa Cantu–Moreno,
  • Marco Arturo García–Rentería,
  • Ventura Lilia Cruz–Hernández,
  • Víctor Hugo López–Morelos,
  • Lázaro Abdiel Falcón–Franco

摘要

AISI 347 stainless steel plates (7 mm thick) were gas metal arc welded (GMAW) in both the as-received (hot-rolled) and solution heat-treated (SHT) conditions using ER-308 filler wire. The welding process was performed with and without the application of a 3-mT external electromagnetic field (EMF). Microstructural characterization showed that using EMF reduced the size of the heat-affected zone (HAZ) and resulted in more uniform microhardness values across the transverse section of the welded joint. Intergranular corrosion and resistance to pitting corrosion (RPC) were evaluated in a solution of 1 M H2SO4 + 0.5 M HCl and a 3.5% NaCl solution, respectively. These results correlated well with the microstructural findings since low degrees of sensitization (DOS), similar to those of the base metal, were observed in the samples welded with EMF. Similarly, RPC showed that the EMF significantly improved this property, doubling the resistance with respect to samples plainly welded.

Graphical Abstract