Tribological Properties and the Effect of Graphene Nanoplatelets on Ti-64 based Hybrid Composites for Aerospace applications

Abstract

In this report, the powder metallurgy-derived composite materials were investigated. The current research looked at the tribological patterns of Ti-64 which is Titanium 6-Aluminium 4- Vanadium composites for tribological properties was examined. For this purpose, Ti64 composites for three samples had been created using procedure of Spark Plasma Sintering (SPS). Using the essential and crucial method known as Spark Park plasma sintering (SPS), powder particles can be rapidly aggregated by applying current and pressure simultaneously. As in present research, SPS processed 100 percent industrially pure titanium was produced through a three-step sintering procedure densification. The procedure had been a three-step one chosen after comparing it to either cumulative or one step sintering cycles. Nano-indentation and high frequency techniques were used to determine the elastic modulus, as well as the toughness and uniaxial compressibility at ambient temperature. Mechanical characteristics like micro-hardness and Vickers hardness were also measured at room temperature. Microhardness measurements from Vickers’s hardness test for the three materials were slight differences in their hardness values. Microhardness measurements show that the Ti–6Al–4V alloy of sample T1 is harder than the remaining other two samples because of the element addition of Fe for 0.85% of mass percentage. Tribometers were used to perform sliding wear tests on requisite samples of Ti-64. The a particular wear rate rises as the normally applied load rises, but after a certain time, say after 2000 m sliding distance, wear becomes stagnant. From 30N to 50N, sample T3 shows an 88 per cent improvement in wear rate. The greatest weight loss was discovered to occur at higher load values. Furthermore, the wear rate decreases as the normal load decreases. Surface morphology was also examined to get the requisite wear track analysis right after tribology via Scanning Electron Microscope (SEM) technique. SEM micrograph images show that most significant abrasive wear, ploughing, and plastic deformation dominant wear mechanisms in a Ti-64 mixed reinforcement composite sample at loads of 10N, 30N, and 50N and a sliding velocity of 1m/s. At a load of 10N and a sliding velocity of 1 m/s, Delamination, oxygenation, and abrasive wear were named as the dominant wear mechanisms. The at loads of, the composite materials surface exhibited delamination and plastic deformation wear 10 N and 30 N with sliding velocities of 1 m/s respectively. X-ray diffraction was also utilised check the crystallographic behaviour of the requisite samples of Ti-64. Properly refined peaks can be seen from XRD data in context using the use of X'Pert high score plus software, allowing the required miller indices for identification of lattice size and lattice strain values were calculated.