Al-alloys are preferred in the automotive industry because of theirs lightweight. European Union has on the present big interest of share recycling aluminium, and so increase interest about recycled (secondary) aluminium alloys and castings from them. Recycled aluminium alloys are made out of aluminium scrap and workable aluminium garbage by recycling. Due to the increasing production of recycled aluminium cast alloys is necessary their strict metallurgical control. The mechanical properties and the microstructure are dependent on the composition, melt treatment conditions, solidification rate, casting process and the applied thermal treatment. The mechanical properties depend, besides the morphologies, type and distribution of Si, Cu, Mg and Fe-phases, on the grain size, DAS, porosity distribution or profile. Therefore, study the microstructure of Al alloys is very important. Analysis of microstructure in the AlSi9Cu3 alloy was performed on the SEM. For study and identification of intermetallic phases' was utilized standard (Dix-Keller, 0.5% HF) and deep etching. Deep etching consists of dissolving the alphamatrix in the reagent (30 s in HCl) in order to reveal the three-dimensional morphology of the silicon particles and intermetallic phases. For elemental composition of the specimen were used x-rays analysis (line, point and surface -mapping). Finally the fracture surfaces of Al-Si alloy after impact test in the as-cast state were observed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.