Lecturer

Al-Sn alloys have a very long history to be used as bearing materials. These alloys provide a good combination of strength and surface properties. This study aimed to investigate solidification and mechanical behavior of Al-Sn alloy against both the molding conditions and tin content (20 % , 30 % , 40 % Sn). A metal mold with a different diameter was prepared to study the solidification rate; tribological experiments have been carried out by using a pin on disc machine to investigate the effect of the alloying element content and the molding conditions on the wear resistance and microstructure of the alloys. The results showed with the increasing of tin content the solidification time decreased, as also a decrease of the liquidus temperature was observed and then increased with increasing Sn %. However, decrease of both the ultimate tensile strength and the hardness is obtained by the increase of the tin content also the wear rate decrease with increase of tin content