Chemistry — Phase: aluminium–copper (duralumin)
The precipitation-hardening Al-Cu system.
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title "Aluminium-copper (Al-rich)"
type binary
basis weight
component A "Al" melting 660
component B "Cu" melting 1085
// Eutectic alpha + CuAl2 at 33 wt% Cu and 548 C. The solvus falling
// from 5.65 wt% Cu is the one age-hardening works along.
eutectic 0.33 548
solvus 0.0565 0.535
region "Liquid" at (0.5, 0.94) color teal
region "alpha (Al solid solution)" at (0.03, 0.38) color blue
region "alpha + liquid" at (0.20, 0.40) color amber
region "alpha + CuAl2 (theta)" at (0.30, 0.15) color purple