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Figure 3
Isopleth at 70 wt% Al of the system Al–Mg–Cu within the temperature range 673–853 K, at ambient pressure (Effenberg et al., 2005BB1). Vertical dashed grey, green and orange lines indicate the Al, Mg and Cu at% contents, respectively, of the nominal alloy AlMg15Cu10 (75 wt% Al), which translates into Al78Mg17Cu5 in at%. As the exact composition of our alloy is not in this isopleth, the colour-coded vertical lines corresponding to each element do not meet but delimit a compositional range denoted by the shaded area in which the occurring phases are Al, S, T and L.

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