Microstructure, Mechanical and Corrosion Behaviour of AN AA2024-T3 FSW Joint
The FSW weld consists of three distinct microstructural zones. The microstructure inside each zone is directly impacted by the FSW process parameters. The aim of this article is to correlate microstructure, microhardness and corrosion sensitivity of a AA-2024-T3 FSW joint for one processing parameter set. A microstructural analysis has been conducted in each weld zone by the combination of TEM observations, chemical and DSC analysis. Moreover, a small electrochemical cell was used to estimate the corrosion sensitivity of the distinct zones by localized open circuit potential measurements all along the weld. Mechanical properties were evaluated using Vickers microhardness measurements. The results show a direct correlation between mechanical property evolution, local corrosion process involved and microstructure modification.
T. Chandra, M. Ionescu and D. Mantovani
E. Bousquet et al., "Microstructure, Mechanical and Corrosion Behaviour of AN AA2024-T3 FSW Joint", Advanced Materials Research, Vol. 409, pp. 257-262, 2012