The Tribocorrosion Behaviour of Ti-6Al-4 V Alloy: The Role of Both Normal Force and Electrochemical Potential

Abstract The tribocorrosion behaviour of Ti-6Al-4 V exposed to phosphate buffered saline was investigated under a range normal forces in both cathodic and anodic regions provide basis for properly deriving the tribological constants this alloy. To achieve this, new customised tribotester designed manufactured rub disks against zirconia balls. tests were conducted at sliding frequency 1 Hz distance 4.8 mm various potentials as 17.5, 10.8, 6, 3.5 N, ? 1.2, 0.6, 0, 0.4, 0.8 V/V Ag/AgCl , respectively. damaged surfaces characterised by scanning electron microscopy energy-dispersive X-ray spectroscopy, profilometer, micro-hardness tester. post analyses confirmed appearance some minor cracks together with third-body wear particles. No significant changes hardness detected after tests. results profilometry electrochemical current indicated that region chemical losses accounted proportion (up 36%) total loss. proportional loss increased potential; however, neither direct nor reverse relationship found force. Overall, domain, material potential level due formation oxide layer which may induce more shear cutting. In hydrogen embrittlement changed properties interface thus, amount Both mechanical described an existing theory; thereby, theory equipped its tribocorrosive future on alloy extensively used applications including biomedical implants.