Precipitation in aluminum alloys AA6111 and AA6016

Aluminum-alloy AA6016 alloy, aged under the automotive paint bake (180 deg C for 0.5 h) and peak strength conditions (180 deg C for 11 h), contains only one precipitating phase, identified as beta " with the monoclinic crystal structure. In Al-alloy AA6111 alloy, aged at 180 deg C for 0.5 and 1...

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Bibliographic Details
Published in:Scripta materialia 1999-08, Vol.41 (7), p.703-708
Main Authors: Perovic, A, Perovic, D.D, Weatherly, G.C, Lloyd, D.J
Format: Article
Language:English
Subjects:
Aluminum alloys
Analytical electron microscopy
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Precipitation
Solid-phase precipitation
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Summary:Aluminum-alloy AA6016 alloy, aged under the automotive paint bake (180 deg C for 0.5 h) and peak strength conditions (180 deg C for 11 h), contains only one precipitating phase, identified as beta " with the monoclinic crystal structure. In Al-alloy AA6111 alloy, aged at 180 deg C for 0.5 and 11 h, two phases, beta " (monoclinic) and Q (hexagonal) coexist. In AA6016 the Mg/Si ratio increases from 0.85-1.01 with increasing aging time in the beta " phase and reaches a value of 1.35 in the Q phase. In AA6111 the Mg /Si ratio in the Q phase approx1.0.
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(99)00204-3