Abstract
Plates, 12.7 mm thick, of AISI 304 austenitic stainless steel were welded using a non-conventional joint design in a single pass with and without the application of magnetic fields with different orientations. A perpendicular electromagnetic field was applied in order to obtain high penetration by turning helicoidally the path of the plasma within the groove of the joint during welding. Observation of the transverse profiles of the welds revealed fully penetrated welds; however, lack of sidewalls fusion was seen in every profile. Welding with magnetic field decreased the extent of this defect. The effect of the magnetic field was evaluated in terms of susceptibility to localized corrosion in the heat affected zone (HAZ) by the double loop-electrochemical potentiokinetic reactivation (DL-EPR) test. These results indicated that the as-received plates were already sensitized and plain welding worsened this condition in the HAZ. DL-EPR curves revealed that welding with perpendicular magnetic field reduced the degree of sensitization in the HAZ. Examination of the essayed surfaces in the scanning electron microscope (SEM) showed that generalized corrosion took place instead of localized corrosion.
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The authors thank CONACyT for financial support.
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García, R., Cortes, R., García, D.L., López, V.H. (2015). Effect of the Perpendicular Electromagnetic Field in the 304 Austenitic Stainless Steel Welding in a Single Pass. In: Pérez Campos, R., Contreras Cuevas, A., Esparza Muñoz, R. (eds) Materials Characterization. Springer, Cham. https://doi.org/10.1007/978-3-319-15204-2_12
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DOI: https://doi.org/10.1007/978-3-319-15204-2_12
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-15203-5
Online ISBN: 978-3-319-15204-2
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