تاثير مقدار منيزيم و فيلتر گذاري بر خواص كششي و خستگي آلياژ A356 آلومينيم

Effect of Magnesium Content and Filtration on Tensile Properties and Fatigue Life of A356 A1 Alloy

Effect of Magnesium content and employing of filtering system on mechanical properties of A3 56 aluminum alloy has been studied. In this respect, aluminum alloy with 7% silicon and different amounts of 0.48,0.55 and 0.64% magnesium has been prepared and casted at two conditions including with- and without filtering system. The results reveal that magnesium content has an appreciable effect on mechanical properties of A356 alloy, as small variation of magnesium content, from 0.42 to 0.64%, improves tensile strength by 44%, but it reduces elongation by 29%. In addition, employing of filter system also improves mechanical properties and its effect is more significant on fatigue life than that on tensile properties, as filtering improves fatigue life by 60%. Key Word: A356 alloy, Magnesium, Filter, Tensile strength, elongation, Fatigue life.