Publication

Abstract : pThe key objective of the paper is to investigate the mechanical and wear Properties of functionally graded copper composite (Cu–11Ni–4Si) reinforced with 10nbsp;wt% graphite synthesised using stir casting followed by horizontal centrifugal casting technique. Microstructural analysis conducted radially from outer surface exhibited an increasing gradient of particle distribution and maximum hardness of 195nbsp;HV was observed at inner surface. Tensile strength of outer and (1–8nbsp;mm) and inner zone (9–15nbsp;mm) was determined and failure mechanism was analysed. Mechanical tests revealed better properties at inner surface and wear resistance of this layer was analysed using pin-on-disc tribometer based on Taguchi’s L27 orthogonal array with three process parameters, applied loads (10, 20 and 30nbsp;N), sliding velocities (1, 2 and 3nbsp;mnbsp;s−1) and sliding distances (500, 1000 and 1500nbsp;m). Optimum parameters were identified and confirmation of experiments was carried out. Worn surface was analysed using Scanning Electron Micrograph and oxide layer formation was noticed at increased velocities which enhanced wear resistance. © 2018, Springer Nature B.V./p