RT Journal Article SR Electronic A1 Machuta, Jiří A1 Nová, Iva A1 Kejzlar, Pavel T1 Structure and Mechanical Properties of Aluminium Alloys AlSi10 and AlSi5Mg JF Manufacturing Technology Journal YR 2017 VO 17 IS 5 SP 772 OP 777 DO 10.21062/ujep/x.2017/a/1213-2489/MT/17/5/772 UL https://journalmt.com/artkey/mft-201705-0025.php AB The article presents the microstructure and mechanical properties of two types of aluminium alloys AlSi10 and AlSi5Mg. The structure and mechanical properties as a tensile test of two alloys AlSi10 and AlSi5Mg were studied and compared. Gravity casting is very good process for making complex mechanical parts of low density metals like aluminium alloys. Therefore our samples are prepared by gravity casting technology. Light metals have come to the forefront in the automotive industry and improved fuel economy. Therefore, we compared the AlSi5Mg alloy with a commonly used alloy AlSi10. This type of alloy AlSi5Mg has excellent casting and technological properties (good machinability and corrosion resistance). We are engaged with the issue of the production of castings for the automotive industry, at our department the Department of Engineering Technology-Technical University of Liberec, many years. Currently, we are focusing on aluminium alloys, their metallurgy and crystallization conditions with minimal internal defects.