Effects of Initial Surface Roughness and Sliding Speed Study on the Tribological Characteristics of AA6061 and CuZn37Pb2 Alloys

The paper examines the influence of initial surface roughness and sliding speed on friction and wear behavior of AA6061 aluminum alloy and brass alloy (CuZn37Pb2) under dry contact using a CSM tribometer. Surface roughness of materials studied were measured using optical profilometer. Rough surfaces (Ra=0.37 1.33 μm) were prepared on two materials: AA6061 and CuZn37Pb2 alloy. Track width, wear rate, and wear loss values were assessed and contrasted with changes in coefficient of friction values at various starting surface roughness and sliding speeds. Experiments are conducted at sliding speed 0.15;0.24;0.35 and 0.48 m/s. wear track diameter 4;6;8;10 mm. Results show that wear loss, wear rate and track width of CuZn37Pb2 and AA6061 increase at high initial surface roughness and speed but the value of friction coefficient decreases. Various SEM analysis of the wear trace and worn surfaces for each alloy at different sliding speed were analysed and compared.