EXPERIMENTAL INVESTIGATION of DRY SLIDING WEAR BEHAVIOUR of STIR CASTED AZ31 MAGNESIUM ALLOY-CASIO3 METAL MATRIX COMPOSITES

Abstract

Metal matrix composites (MMCs) became one of the obligatory material in the transportation sector where Magnesium MMCs are in high demand due to their exclusive properties like low density, good wieldable, recyclable, and casting. In the present work, wear behavior of AZ31 magnesium alloy added by calcium silicate (CaSiO3) as additive of various compositions of its weight percentage from 0 to 8% is determined and tested under dry sliding condition. After experimentation, results revealed that the sample S-3 which comprises 4% CaSiO3, shows the minimum pin temperature of 33.1 0C. In terms of frictional force, sample S-4 which has 6% CaSiO3, shows a least frictional force of 4.81 N. The sample S-2 formed by 2% CaSiO3 shows the highest value of 14.1 N of frictional force. By comparing the coefficient of friction value, the specimen sample S-4 displays the least friction value of 0.160 µ and sample S-2 exhibits the highest value as 0.470 µ. Wear occurred between pin and disc is observed as 292 µm for sample S-2 which is low compared to sample S-4 of 324 µm. By consolidation of results, the sample S-4 shows better performance in terms of force, coefficient of friction, and pin temperature concerning time.