Investigation of mechanical properties of natural aged AA 7075 aluminum alloy

Abstract

Heat treatment, which requires heating and cooling of solid metals and chemical compounds without the formation any difference in mechanical properties is defined as processes which provide the change. Some features required to provide an Al alloy has been widely practiced in the heat treatment. Hardness and strength can be increased by heat treatment may also be enhanced mechanical properties as well as other terms. AA 7075 natural aging of aluminum alloys obtained after the corrosion resistance of FeAl, Al2Cu, Mg2Si ve AlFeSi phase were investigated. A sample of 7075 aluminum alloy to homogenize microstructures in the conventional oven 20 minutes at 530 ° C, allowed to stand was subjected to water quenching. Then samples of phase transformations in the alloy to ensure the normal room conditions (25 ° C) 1 week, 1 month and 2 months natural aging method was used in the. After natural aging of the samples; characterization of the internal structure, microhardness and corrosion resistance were examined. Optical microscope, XRD analysis and SEM images based on the results obtained from the amount of the precipitate increased with time and depending on the increased amount of precipitate was increased mechanical properties in the material.