Effect of Additives of Recycled Al Alloy on the Microstructure & Mechanical Properties of Standard Al-Si Alloy Which Produced by Precision Casting


The expansion in using Al-Si Alloys for the industrial and engineeringapplications for their distinguished properties, presented in the combination betweenmechanical properties and corrosion resistance in addition to the light weight, leads tofind substitution resources to produce these alloys and more than 40% of the worldproduction depends upon such a kind of production. Therefore, it is necessary andimportant to search in details the mechanical properties and microstructure of therecycled or secondary alloys. In this research , many types of practical experimentsare made for the Al- Si alloys by adding recycled alloys in different percentages (25-36%) , which produced by precision casting ,specimens prepared for the testing oftension , torsion, impact, fatigue and microstructure ,to find the optimum mechanicalproperties with different variables by preventing the defects produced by casting suchas the presence of hydrogen and Al2O3 and their effect on the mechanical properties .Ithas been found the higher percentage of the original alloy improving the mechanicalproperties in the new alloy.