Dynamical scaling of the structure function in quenched Al-Zn and Al-Zn-Mg alloys

The time evolution of the structure function $S(k,t)\mathrm{}$ of quenched Al-Zn binary alloys and Al-Zn-Mg pseudobinary alloys heated to 80 and 40°C (or 18°C) has been measured by small-angle neutron scattering. The structure function obeys a scaling relation $S(k,t)=\alpha k_m{\mathrm{}\left(t\right)\mathrm{}}^{-3\mathrm{}}\tilde{S}\left(\frac{k}{k_m\mathrm{}\left(t\right)\mathrm{}}\right)$, in terms of a universal scaling function $\tilde{S}\mathrm{}\left(x\right)=\frac{3x^2}{(2+x^6)}$, proposed by $H$. Furukawa [Physica A 123, 497 (1984)], for a wide range of values of the aging time $t$, even for different aging temperatures and different samples.