Abstract
AbstractSurface texture plays a vital role when two bodies slide against each other. So, areal surface parameters are employed to characterize the surface texture. Ti6Al4V is extensively used in aerospace, automobile, bio implant, and sporting equipments. Ti6Al4V exhibits a high strength-to-density ratio, good corrosion resistance, but it has poor tribological properties. Hence, the study of the effect of areal surface parameters on the coefficient of friction (CoF) becomes the main aim in the present work. Random textured surfaces of Ti64 were developed through electrical discharge machining (EDM) at similar process parameters. Surface texture is characterized with the help of a 3D profilometer to obtain the areal surface parameters. To study the tribological behavior, pin-on-disk (PoD) test was conducted under dry conditions. Endeavors were made to study the correlation between CoF and surface parameters. It is observed that surface parameters core roughness depth (Sk), maximum peak height (Sp), auto correlation length (Sal), maximum height (Sz), arithmetic mean height (Sa), skewness (Ssk), and kurtosis (Sku) were positively correlated with CoF. CoF is negatively correlated with root mean square gradient (Sdq) and reduced peak height (Spk). Variation of CoF with predominant areal surface parameters was also studied. It was identified that among all areal surface parameters, core roughness depth (Sk) has an absolute maximum value of 0.946 correlation coefficient with CoF.KeywordsEDMAreal surface parametersTi6Al4VFriction
Published Version
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