The effect of long term creep exposure on the microstructure and properties of an underaged Al–Cu–Mg–Ag alloy

The effect of long term creep exposure on the microstructure and properties of an underaged Al–Cu–Mg–Ag alloy

An underaged Al–Cu–Mg–Ag alloy shows zero secondary creep after 20,000 h at 130 °C and a stress of 200 MPa. Specimens exposed with and without an applied load reveal that dynamic precipitation of θ ′ and S ′( S) occurs on dislocations during primary creep, whereas σ phase forms in the matrix of the...

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Veröffentlicht in:Scripta materialia 2004-05, Vol.50 (9), p.1227-1231
Hauptverfasser: Lumley, R.N., Polmear, I.J.
Format: Artikel
Sprache:eng
Schlagworte:
Aluminium
Applied sciences
Creep
Dynamic precipitation
Exact sciences and technology
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
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Zusammenfassung:An underaged Al–Cu–Mg–Ag alloy shows zero secondary creep after 20,000 h at 130 °C and a stress of 200 MPa. Specimens exposed with and without an applied load reveal that dynamic precipitation of θ ′ and S ′( S) occurs on dislocations during primary creep, whereas σ phase forms in the matrix of the unloaded specimen.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2004.02.001