Structure and mechanical properties of AlZnMgCuZr alloy manufactured from powders

Purpose: The subject of the research was to study the effect of microstructure and mechanical properties of an alloy AlZnMgCuZr with addition of 0.45 % Zr manufactured from powders. Paper also presents results of different states of precipitation strengthening and further plastic deformation, including hydrostatic extrusion.Design/methodology/approach: The alloy AlZnMgCuZr was manufactured from powders using hot consolidation in process of direct extrusion and further plastic deformation (hydrostatic extrusion). The microstructure was studied using optical, scanning electron and transmission electron microscopes. The mechanical properties are discussed for different states of precipitation strengthening.Findings: Obtained results Rm above 700 MPa show significant possibilities of manufacturing Al alloys from powders with ultrafine grain and nanometric structure which properties exceeding alloys manufactured with classical methods.Research limitations/implications: The further studies are planned with use of plastic consolidation in process of direct extrusion to optimize final process of hydrostatic extrusion. The purpose is to increase mechanical properties.Practical implications: Extruded products which have higher mechanical properties than the standard are predicted to be used in aircraft industry.Originality/value: The results of studies and conclusion presented in the paper give prospects for manufacturing products from aluminium alloys offering even better mechanical properties.