Abstract
The effect on the microstructure and mechanical properties of the application of an external axial electromagnetic field of 3 mT during welding plates of 2205 duplex stainless steel (DSS) and 316L austenitic stainless steel (ASS) was studied. Plates of 6.35 mm in thickness with a single-V joint configuration were welded in a sole pass by adjusting welding parameters to heat input 1.2 kJ/mm. An ER-2209 filler wire along with the mixture 95% Ar + 3% N2 + 2% O2 as shielding gas were used. The direction of the magnetic field lines was parallel to the electrode by feeding electric current into a coil placed around the joint. Microstructural characterization of the welds revealed that with the electromagnetic stirring of the weld pool, the extent of the high temperature heat affected zone (HTHAZ) of 2205 DSS was reduced from 6.77 to 4.04 mm2. Vickers microhardness (HV100) values of the 2205 DSS were maintained to about 254 ± 10 with a slight increase in the HTHAZ up to 272 ± 2. Microhardness in the HAZ of the 316L decreased ~18.5% as compared to the 316L ASS in the as-received condition. The tensile strength of the dissimilar welded samples was higher than the resistance of the weaker base metal, 316L, with fracture consistently occurring far away from the fusion line. Areas with different grain sizes were observed in the HAZ of the 316L ASS, in some areas there was an increase from 15 to 28.5 ± 8 μm, while in others the grain size increased up to 75 ± 29 μm.
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Hernández-Trujillo, S., López-Morelos, V.H., García-Hernández, R., García-Rentería, M.A., Ruiz-Marines, A., Verduzco-Martínez, J.A. (2018). Effect of Electromagnetic Field on the Microstructure and Mechanical Properties of the Dissimilar 2205/316L Welded Joint. In: Ambriz, R., Jaramillo, D., Plascencia, G., Nait Abdelaziz, M. (eds) Proceedings of the 17th International Conference on New Trends in Fatigue and Fracture. NT2F 2017. Springer, Cham. https://doi.org/10.1007/978-3-319-70365-7_28
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DOI: https://doi.org/10.1007/978-3-319-70365-7_28
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