Controlled precipitation in a new Al-Mg-Sc alloy for enhanced corrosion behavior while maintaining the mechanical performance
(2023) Materials Characterization — Vol. 200, p. 112886 (2023)
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- Authors
Kashiwar, Ankush 
- Abstract
- The hot working of 5xxx series alloys with Mg ≥3.5 wt% is a concern due to the precipitation of β (Al3Mg2) phase at grain boundaries favoring Inter Granular Corrosion (IGC). The mechanical and corrosion properties of a new 5028-H116 Al-Mg-Sc alloy under various β precipitates distribution is analyzed by imposing different cooling rates from the hot forming temperature (i.e. 325 ◦C). The mechanical properties are maintained regardless of the heat treatment. However, the different nucleation sites and volume fractions of β precipitates for different cooling rates critically affect IGC. Controlled furnace cooling after the 325 ◦C heat treatment is ideal in 5028- H116 alloy to reduce susceptibility to IGC after sensitization.
- Affiliations
University of Antwerp Department of Physics, Electron Microscopy for Materials Science (EMAT) SONACA Université de Liège Aerospace and Mechanics Department, Metallic Materials Science
Citations
Krishnamurthy, S. C., Arseenko, M., Kashiwar, A., Dufour, P., Marchal, Y., Delahaye, J., Idrissi, H., Pardoen, T., Mertens, A., & Simar, A. (2023). Controlled precipitation in a new Al-Mg-Sc alloy for enhanced corrosion behavior while maintaining the mechanical performance. Materials Characterization, 200, 112886. https://doi.org/10.1016/j.matchar.2023.112886 (Original work published 2023)