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

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

Souza, Matheus Antunes de; Lebrão, Susana Marraccini Giampietri; Colosio, Marco Antonio; Lara, José Agustín Castillo

Artigo:

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 tubular-like 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 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.

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 tubular-like 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 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.

Palavras-chave:

DOI: 10.5151/simea2018-PAP75

Referências bibliográficas

• [1] ASTM E3 – 11 Standard Guide for Preparation of Metallographic Specimens.36 ASTM A763 – 14 - Standard Practices for Detecting Susceptibility to Intergranular Attack in Ferritic Stainless Steels. CAMPBELL, R. D. Ferritic Stainless steel Welding Metalurgy. Key Engineering Materials, v. 69 & 70, p 167-216, 1992. FARIA, R. A. Efeito dos elementos Ti e Nb no comportamento em fadiga de aços inoxidáveis ferríticos utilizados no sistema de exaustão de veículos automotores. 2006. 245f. Doutorado em Engenharia de Materiais – Universidade Federal de Ouro Preto, Ouro Preto, 2006.

Como citar:

Souza, Matheus Antunes de; Lebrão, Susana Marraccini Giampietri; Colosio, Marco Antonio; Lara, José Agustín Castillo; "ANALYSIS OF SENSITIZATION IN WELDED JOINTS IN FERRITIC STAINLESS STEEL WITH TUBULAR WIRE STABILIZED AND BISTABILIZED", p-557-566. In: . São Paulo: Blucher, 2018.
ISSN 23577592, DOI 10.5151/simea2018-PAP75