ANALYSIS OF SENSITIZATION IN WELDED JOINTS IN FERRITIC STAINLESS STEEL WITH TUBULAR WIRE STABILIZED AND BISTABILIZED

Matheus Antunes de Souza, Susana Marraccini Giampietri Lebrão, Marco Antonio Colosio, José Agustín Castillo Lara
2018 Blucher Engineering Proceedings   unpublished
The present work aims to analyze the interaction and the susceptibility to intergranular corrosion in welded joints of carbon steel and AISI 409 stainless steel welded with tubularlike stabilized titanium and bistabilized with titanium and niobium. The corrosion susceptibility tests were carried out in 10% oxalic acid with electrolytic analysis to characterize stainless steel sensitization and metallographic analysis with Nital etching to characterize carbon steel. It can be observed the grains
more » ... formed in the joint with bistabilized wire are smaller in both (TAZ) thermally affected and molten zones. Based on the results it is discussed the use of niobium as stabilizer of the welding wire and obtaining a welded region more resistant to intergranular corrosion.
doi:10.5151/simea2018-pap75 fatcat:2obo53nlizakhasrcj2e766qfy