A REVIEW ON EFFECT OF Sn ADDITION TO Al ALLOYS

MECHANICAL ENGINEERING

The mechanical properties as well as the microstructure of Al-Sn based alloys were characterized by using scanning electron microscopy, the Al-Sn alloys generally known as “soft tribological alloys” because these alloys have number of applications in engine bearing materials. The Al-Sn alloys posses excellent friction as well as wear properties. Sn added to Mg-6Zn-2Al alloy and the microstructure were characterized by SEM and the alloys composed of α-Mg, MgZn and Mg2Sn in the range of 0.5–3.0 mass% Sn, and no ternary phase was detected and also excessive Sn addition leads to the coarsening of Mg2Sn particles. Sn has a strong solid solution strengthening ability in the titanium alloy. Al based alloy used for disc material with composition (in wt%): 9.0-12..5%Sn, 0.8-1.25% Cu, Max 2.7-3.35% Si and remainder Al, At different loads i.e. 50,60,70 and 75N the friction and wear behavior of Alloy investigated against high carbon-high chromium steel was investigated at constant sliding speed of 1m/s. therefore the effect of Sn addition to different Al based alloys and its microstructure were characterized systematically.

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