Al-Mg-Sc alloy; Cooling rate; Inter granular corrosion; Precipitation; Controlled precipitation; Cooling rates; Corrosion behaviour; Grain-boundaries; Hot forming; Intergranular corrosion; Mechanical and corrosion properties; Mechanical performance; Precipitate distributions; Series alloys; Materials Science (all); Condensed Matter Physics; Mechanics of Materials; Mechanical Engineering; General Materials Science
Abstract :
[en] 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.
Disciplines :
Materials science & engineering
Author, co-author :
Krishnamurthy, Sanjay C.; Université catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering (iMMC), IMAP, Louvain-la-Neuve, Belgium
Arseenko, Mariia; Université catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering (iMMC), IMAP, Louvain-la-Neuve, Belgium
Kashiwar, Ankush; Université catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering (iMMC), IMAP, Louvain-la-Neuve, Belgium ; Department of Physics, Electron Microscopy for Materials Science (EMAT), University of Antwerp, Antwerpen, Belgium
Dufour, Philippe; SONACA, Gosselies, Belgium
Marchal, Yves ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Fabrication mécanique ; SONACA, Gosselies, Belgium
Delahaye, Jocelyn ; Université de Liège - ULiège > Université de Liège - ULiège
Idrissi, Hosni; Université catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering (iMMC), IMAP, Louvain-la-Neuve, Belgium ; Department of Physics, Electron Microscopy for Materials Science (EMAT), University of Antwerp, Antwerpen, Belgium
Pardoen, Thomas; Université catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering (iMMC), IMAP, Louvain-la-Neuve, Belgium
Mertens, Anne ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Simar, Aude; Université catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering (iMMC), IMAP, Louvain-la-Neuve, Belgium
Language :
English
Title :
Controlled precipitation in a new Al-Mg-Sc alloy for enhanced corrosion behavior while maintaining the mechanical performance
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