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    Understanding the slurry erosion behaviour of iron-based chromium carbide coating material during deposition via arc spray coating method
    (Sage Publications Ltd, 2023) Demirsoz, Recep; Singla, Anil Kumar; Ugur, Abdullah; Erdogdu, Ahmet Emrah; Korkmaz, Mehmet Erdi; Gupta, Munish Kumar; Krolczyk, Jolanta Beata
    The material S235JR was spray-coated with iron-based chromium carbide in the present study. The effects of the initial surface roughness on slurry erosion were investigated. Samples with a rough surface and polished surface were used. The impact of particle concentration, impact velocity and impact angle was studied on the slurry erosion characteristics in terms of mass loss, surface roughness and surface temperature. In addition, the surfaces were analysed using a scanning electron microscope (SEM). Further, the estimation equation has been derived using response surface method (RSM) based on the data obtained in the study. The results show that velocity and concentration are the key factors in determining the mass loss and surface temperature while the impact angle has a relatively minor role. Mass losses in rough samples ranged from 8.8 mg to 40 mg; in polished samples, the range ranged from 5.6 mg to 10.9 mg.
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    Wear performance of Ti-6Al-4 V titanium alloy through nano-doped lubricants
    (Springernature, 2023) Etri, Hamza E. L.; Singla, Anil Kumar; Ozdemir, Mehmet Tayyip; Korkmaz, Mehmet Erdi; Demirsoz, Recep; Gupta, Munish Kumar; Krolczyk, J. B.
    Titanium and its alloys are widely utilized in the biomedical sector, they still exhibit poor tribological properties and low wear resistance when employed against even weaker substances. The poor hardness, instability, high coefficient of friction, low load-carrying capacity, and insufficient resistance to not only abrasive but also adhesive wear are further disadvantages of titanium alloys. The focus of this investigation is on the tribological performance of Ti-6Al-4 V alloy in contact with WC carbide abrasive balls when subjected to nanodoped cooling and lubrication conditions. Tribological experiments were executed on Ti-6Al-4 V flat samples using a ball-on-flat tribometer in dry hybrid graphene/boron nitride combination nanoparticles (MQL, nano-3), nanographene with MQL (nano-1), and boron nitride with MQL (nano-2) conditions. After that, the most significant tribological characteristics were investigated, including volume loss, friction coefficient, wear rate, and micrographic structures. The outcomes also demonstrated that the hybrid nanoparticle situation experienced the least amount of volume loss.