تأثير المعالجات الحرارية و إضافة النيكل على الخواص الميكانيكية لسبائك الألومنيوم عالية المقاومة

Abstract EN

The aluminum alloys of the 7xxx series consist of Al with Zn mainly, with Mg and Cu.

7xxx aluminum alloys has high mechanical properties making it distinct from other aluminum alloys.

In this paper, the effect of adding Nickel and heat treatments on tensile properties, Vickers hardness and microstructure of the 7075 aluminum alloy, were examined.

Different percentages of nickel [0.1, 0.5, 1] Wt.% to 7075 Aluminum alloy were added, and applied various heat treatments (artificial aging T6 and retrogression and re-aging RRA) on the 7075 alloys that containing nickel.

By applying RRA treatment, we obtained better results than the results obtained by applying T6 treatment, and with the addition of nickel to alloy 7075; also we obtained a smoother microstructure for the studied alloys and rise tensile properties and Vickers hardness of alloys.