Abstract

The aim of the present research is to study the effect tin content on wear rate of Al alloys. Mechanism wear behavior was studied by (pin on disc) technique under different conditions of applied loads(100-2500)g, constant sliding speed and time, steel disc hardness is 45 HRC. All alloys were prepared with different percent of tin(3,7,13,23,33 and 43)%, also the master alloy (Al-1Cu)was prepared by melting and pouring the molten metal in a metallic mold. Samples of different percentages of tin were investigated under as-cast in order to establish the metallurgical changes and wear. It was found that the tin addition to aluminum alloys decrease the wear rate and improves the wear properties. Also the Al- 43 % Sn alloy is the best alloy in wear resistant and friction coefficient, this is due to network distribution of Sn phase. The bonding between the tin and matrix was improved at higher tin content. The Al-13% Sn-1% Cu exhibited higher wear rate compare with other alloys tested under the same conditions. In high tin alloys the subsurface region does show plastic deformation having occurred in the direction of sliding. The wear rate of the alloys decrease with increasing Sn content and increases observably with increasing load.