Studying magnesium addition on mechanical properties for composit hypereutectic alloys 18 % silicone using adhesive wear

Abstract EN

The impact of time ,speed of sliding and load on wear qualities of hypereutectic aluminum 18% silicon alloys by pin on disc apparatus is actualize.

silicon alloys are most prosperous materials due to include hardness and resistance of wear compared to other alloys or any other composites and by using die-casting, many alloys are prepare at diverse of magnesium additions (2.5, 3.5, 4.5)wt% to the Al-18%Si- alloy in order to study the effect of magnesium additions on the wear rate The microstructure of prepared alloys is examine by optical microscope..

The experiments of the wear are carry out on a set of specimens under different times ranging from (10 to 40) minutes, and loads (0.5 to 2) kg, and diverse sliding speeds (2.5 to9) m /sec the results of microstructural show the existence of primary silicon (Si) and phases of eutectic silicon and adhesion wear properties decrease when magnesium was added to aluminum at all percentages.

It was concluded that decrease in hardness and increase in ductility contributed to decreasing in wear properties in the range of these values.