In the last century, aluminium has become one of the most widely used metals as its relatively low density ensures high levels of flow stress. The production of primary aluminium is a lengthy process characterised by large amounts of waste and high consumption of fuel and energy. Owing to its composition, aluminium alloy 6082 ranks in the series 6xxx, which is known for its corrosion resistance and high tensile strength.
The thesis deals with the question whether, in the secondary aluminium alloy 6082, the change of the content of the share also causes changes in mechanical properties and if the alloy with differing shares of recyclable aluminum meets the designated mechanical properties prescribed by the standard designation for wrought aluminium alloy 6082 in cast state. The compound used in this research was the circular recycled alloy 6082. Five experimental samples were made by mixing the secondary and primary aluminium alloys. The castings contained 100 %, 75 %, 50 %, 25 % and 0 % of the secondary aluminium alloy. The tubes for tensile testing and the samples for the measurement of hardness were made from the casting for mechanical testing. The samples for the measurement of hardness were also used for the examination of chemical composition with the X-ray fluorescence spectrometer.
After the carried out tests the properties compared were tensile strength, flow stress, elongation and hardness of the experimental alloys. The results showed that all the manufactured samples have adequate chemical composition, tensile strength, flow stress, elongation and hardness according to the obtained theoretical standard data for wrought aluminium alloy AA6082 in cast state. The best mechanical properties belong to the sample made from 100 % secondary aluminium alloy. The best mechanical properties out of the experimental samples were shown in sample F, in which the share of the secondary circular aluminium alloy is 50 %.