Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of friction stir welding (FSW) on the electrochemical behavior and galvanic coupling of AA2024-T3 and AA7475-T651

Full text
Author(s):
Bugarin, A. F. S. [1] ; De Abreu, C. P. [1] ; Terada, M. [2] ; De Melo, H. G. [3] ; Costa, I [1]
Total Authors: 5
Affiliation:
[1] Inst Pesquisas Energet & Nucl, Ctr Ciencia & Tecnol Mat, Av Prof Lineu Prestes 2242, BR-05508000 Sao Paulo, SP - Brazil
[2] Inst SENAI Inovacao Manufatura Avancada & Microfa, Rua Bento Branco de Andrade Filho 379, BR-04757000 Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Dept Engn Met & Mat, Av Prof Mello Moraes 2463, BR-05508030 Sao Paulo, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: MATERIALS TODAY COMMUNICATIONS; v. 25, DEC 2020.
Web of Science Citations: 0
Abstract

In this study, the local electrochemical activity of AA2024-T3 and AA7475-T761 joined by friction stir welding (FSW) was investigated as a function of time by electrochemical tests in 0.01 mol L-1 NaCl solution using a mini cell. The welding procedure resulted in increased electrochemical activity of the weld affected zones of both alloys, which electrochemical activities increased with immersion time, as demonstrated by the electrochemical behavior. In the heat affected zone (HAZ) and the thermomechanically affected zone (TMAZ) of AA7475-T651 the increased activity was due to precipitation of eta phase at the grain boundaries stimulated by thermomechanical effects. On the other hand, the enhanced activity in the TMAZ/HAZ of the AA2024-T3 was associated to a large concentration of copper rich cathodic particles broken by tool rotation that were spread along this zone. However, the zone of highest electrochemical activity was the stir zone (SZ) and this was ascribed to galvanic coupling between the two alloys, AA2024-T3 and the AA7475-T651, where the former acted as cathodic and the latter as anodic area. (AU)

FAPESP's process: 13/13235-6 - Investigation on the localized corrosion and the fatigue corrosion resistance of high strength aluminum alloys joined by friction stir welding (FSW)
Grantee:Isolda Costa
Support Opportunities: Research Projects - Thematic Grants