engleski

X-ray powder diffraction study of few Al–4.5 at% Zn-x at% Mg alloys

Seven Al-4.5at%Zn-xat%Mg alloys, with x ranging between 0 and 3.0, are studied by X-ray powder diffraction. The following measurements are preformed: (i) the dependence of the lattice constant of alpha-phase of the as-quenched and slowly cooled alloys on x at RT, (ii) the thermal expansion of the equilibrium eta(MgZn_2)-phase and its dissolution in the alpha phase at elevated temperatures. It turns out that in particular the analysis of the lattice constant of the matrix, alpha, results in valuable information about the amount of solved atoms of the alloyed elements and matrix stresses.

Al-Zn-Mg alloys ; lattice constants ; X-ray powder diffraction

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