Journal ArticleDOI
Precipitation in AI-Cu-Mg-Ag casting alloy
TLDR
In this paper, it was shown that AI-Cu-Mg-Ag alloys have a high response to hardening in the artificially aged condition and this effect is considered to arise because silver changes the ageing process occurring in the equivalent ternary Al-CuMg alloy and promotes precipitation of thin plates of a monoclinic form of the phase θ(CuAl2) on the matrix planes.Abstract:
Castings made from AI-Cu-Mg-Ag alloys have a high response to hardening in the artificially aged condition This effect is considered to arise because silver changes the ageing process occurring in the equivalent ternary Al-Cu-Mg alloy and promotes precipitation of thin plates of a monoclinic form of the phase θ(CuAl2) on the {111} matrix planes Replacing silver with cadmium also causes increased hardening, although the effect is less and arises from a refinement in the size of precipitates formed in the existing ageing processread more
Citations
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Journal ArticleDOI
Microstructural Evolution and Age Hardening in Aluminium Alloys: Atom Probe Field-Ion Microscopy and Transmission Electron Microscopy Studies
Simon P. Ringer,Kazuhiro Hono +1 more
TL;DR: In this article, the authors examined the microstructural evolution in selected aluminium alloys based on commercial age hardenable 2000, 6000, and 7000 series alloys and showed that the nature and kinetics of the precipitation process depend on the solute-solute interactions that produce solute clusters.
Journal ArticleDOI
The precipitate Ω phase in Al-Cu-Mg-Ag alloys
Barry C Muddle,I.J Polmear +1 more
TL;DR: In this article, the combined addition of small concentrations of Ag and Mg to Al-Cu alloys promotes precipitation of a phase, designated Ω, that forms as thin, hexagonal-shaped plates on matrix {111}α planes, and the morphology of the precipitate phase is consistent with the intersection point group (2m) defined by symmetry elements common to the two lattices in the observed orientation relationship.
Journal ArticleDOI
Evolution of Ω phase in an Al-Cu-Mg Ag alloy a three-dimensional atom probe study
TL;DR: In this article, the evolution of plate-like precipitates of the Ω phase in an Al 1.9Cu 0.3Mg 0.2Ag (at.%) alloy has been investigated by three-dimensional atom probe (3DAP) and transmission electron microscope (TEM) techniques.
Journal ArticleDOI
Design and development of an experimental wrought aluminum alloy for use at elevated temperatures
Ian J. Polmear,M. J. Couper +1 more
TL;DR: In this article, a new wrought aluminum alloy has been designed having high room temperature strength (e.g., 0.2 pct P.S.P.A) combined with improved creep resistance at temperatures in the range 150° to 220 °C.
Journal ArticleDOI
Effects of cold work on precipitation in Al-Cu-Mg-(Ag) and Al-Cu-Li-(Mg-Ag) alloys
TL;DR: In this paper, the effects of cold work prior to aging on precipitation hardening in selected Al-Mg-(Ag) and Al-Cu-Li-(Mg-Ag) alloys were investigated.
References
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Journal ArticleDOI
T-phase Precipitation induced by the Addition of Silver to an Aluminium–Copper–Magnesium Alloy
TL;DR: In this paper, the effects of small amounts (approximately 0.1 atomic per cent) of silver on the structure and properties of certain age-hardening aluminium alloys, since the changes that occur are thought to have both fundamental and practical significance.
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