Corrosion and corrosion-fatigue synergism on the base metal and nugget zone of the 2524-T3 Al alloy joined by FSW process

Author(s)

Moreto, J. A. ^{[1, 2, 3]} ; dos Santos, M. S. ^[1] ; Ferreira, M. O. A. ^[1] ; Carvalho, G. S. ^[4] ; Gelamo, V, R. ; Aoki, V, I. ; Taryba, M. ^[2] ; Bose Filho, W. W. ^[4] ; Fernandes, J. C. S. ^{[2, 3]}

Affiliation

^[1] Fed Univ Triangulo Mineiro UFTM, Inst Exact Sci Nat & Educ, Ave Doutor Randolfo Borges Jr, BR-38064200 Uberaba, MG - Brazil

^[2] Univ Lisbon, Ctr Quim Estrutural, Inst Super Tecn, Av Rovisco Pais, P-1049001 Lisbon - Portugal

^[3] Univ Lisbon, Inst Super Tecn, Dept Chem Engn, Av Rovisco Pais, P-1049001 Lisbon - Portugal

^[4] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Mat Engn, Av Trabalhador Sao Carlense, BR-13566590 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Corrosion Science; v. 182, APR 15 2021.
• Web of Science Citations: 2

Abstract

The corrosion processes and its influence on the FCG curves of the 2524-T3 alloy joined by FSW was studied in the nugget and BM. To assess the corrosion process, SVET, pH micro-potentiometry and EIS were used. The localised corrosion results showed similar BM and nugget zone electrochemical behaviour, while the TMAZ/HAZ region was electrochemically the weakest zone, susceptible to anodic dissolution. The FSW process and saline environment was found to modify the BM and nugget FCG resistance, being more detrimental for the BM due to the primary IM particles that are not present in the nugget, making it chemically more homogeneous. (AU)

• FAPESP's process: 18/25000-7 - Corrosion-Fatigue of alloys AA 2524-T3 considering base metal and welding metal: friction stir welding process ("FSW")
• Grantee: Gabriel Scherma de Carvalho
• Support Opportunities: Scholarships in Brazil - Scientific Initiation