Showing papers in "Tribology International in 2020"

TL;DR: In this article, the performance of different cutting fluid strategies is compared by analyzing the crater wear, progressive power consumption, and surface roughness, microhardness, and microstructure of machined surface and chip.

TL;DR: In this paper, the performance of textured tools while turning Ti-6Al-4V under dry, minimum quantity lubrication (MQL) using canola oil and MQL using graphene blended in canolaoil environment was discussed.

TL;DR: In this article, a systematic experimental study has been conducted to evaluate the sliding tribological properties of CoCrFeNiMo0.2 high entropy alloy at room temperature, and the results showed strong dependence of its friction and wear behaviours on sliding duration, normal load and velocity.

TL;DR: In this paper, the analysis of metrologic and tribologic aspects of machined surfaces obtained after turning with the application of various cooling/lubricating methods is presented. And the surface topography, responsible for the tribological properties of mating parts, is measured.

TL;DR: In this article, the potential of cryogenic machining as a sustainable manufacturing process for drilling of Inconel 718 superalloy was discovered and the experimental results showed temperature-dependent tool wear drastically reduced under cryogenic drilling as compared to dry drilling, and this leads to a reduction in torque values up to 30%.

TL;DR: In this article, the influence of cutting fluid reinforced by multi-walled carbon nanotubes (MWCNTs) into vegetable-based cutting fluid on machinability characteristics of PH 13-8 Mo stainless steel was investigated.

TL;DR: In this article, the research status of fretting damage in key equipment and structures of nuclear power plant is reviewed, and the authors have solved many problems, accumulated a lot of experience, and put forward many criteria.

TL;DR: In this article, the surface grinding of "Ti-6Al-4V-ELI" was carried out under 20 different grinding-environments viz. dry grinding, conventional flood cooling using synthetic fluid and minimum quantity lubrication (MQL) using three types of biodegradable vegetable oils (with and without graphene nanoplatelets).

TL;DR: In this paper, the influence of tool wear on surface topography and chip formation, during micro-milling of Ti-6Al-4V, using the Ti(C7N3)-based cermet micro-mill is investigated.

TL;DR: In this paper, the wear and rolling contact fatigue of wheel-rail materials were investigated through varying wheel/rail hardness ratios (Hw/Hr) and creepages, and the results indicated that with the Hw/hr increasing from 0.927 to 1.218, the rail wear rate showed an increasing trend.

TL;DR: In this article, the authors investigated the tool wear, surface topography, cutting torque, and surface profile in side milling Ti6Al4V under four sustainable conditions, i.e., dry, supercritical carbon dioxide (scCO2), scCO2 with antifreeze water based minimum quantity lubrication, and scCO 2 with oil-on-water based MQL conditions.

TL;DR: In this article, the authors compared the performance of nanoadditive-based cutting fluid and cryogenic cooling by liquid nitrogen, in terms of machining performance in hard turning processes.

TL;DR: In this paper, different cooling and lubrication techniques, namely without coolant, with coolant and with LCO2 and LN2, were compared when drilling titanium alloy.

TL;DR: Li et al. as mentioned in this paper reported a simple and effective one-step laser irradiation strategy to fabricate a silver/graphene nanocomposite, which effectively avoids the aggregation and enjoys a good dispersion stability.

TL;DR: In this article, a coated nanocomposite with hard core and soft-shell as lubricant nanoadditive is presented, and the compositional variation of wear scar is characterized to explore the possible anti-wear mechanisms.

TL;DR: Graphene oxide (GO) was incorporated into a plasma electrolytic oxidation (PEO)-based coating to further promote the tribological properties and corrosion resistance of AZ31 Mg alloys as discussed by the authors.

TL;DR: In this article, the authors proposed several cutting fluids, such as electrostatic minimum quantity lubrication (EMQL), hybrid NPs immersed EMQL (HNEMQL) and electrostatic lube (EL), for turning 15-5 precipitation-hardened stainless steel (PHSS).

TL;DR: In this paper, the use of 3D printing to manufacture nylon polymer gears is evaluated and the results showed that Nylon 618 provided the best wear performance among the 5 different 3D printed materials tested.

TL;DR: In this paper, the effect of various concentrations of MWCNTs on the microstructures, tribological properties, and wear mechanisms of the composites were systematically examined by scanning electron microscopy (SEM).

TL;DR: In this paper, the lubri-cooling effects of minimum quantity lubrication (MQL) in the micro-milling of additively manufactured Ti-6Al-4V using coated tungsten carbide micro endmills under varying cutting speeds and feed rates were analyzed.

TL;DR: In this article, the effect of shot peening surface roughness on the lifetime of fretting fatigue has been analyzed by means of a series of tests in which surface's fretting test specimens are polished.

TL;DR: In this paper, a 2-μm thick nanostructured tribolayer composed of CuO and Fe2O3 was formed on the worn surface, owing to the plastic deformation, mechanical mixing, oxidation and sintering processes.

TL;DR: In this article, magnetic reduced graphene oxide/Fe3O4 composites were synthesized via chemical co-precipitation method, and they were characterized by field-emission transmission electron microscopy (FETEM), X-ray diffraction (XRD) and Raman spectrometry and magnetic property measurement system (MPMS), respectively.

TL;DR: In this article, the minimum quantity lubrication (MQL) was applied to AISI 321 stainless steel using vegetable-oil-based cutting fluid under different MQL strategies (with and without graphene nanoparticles).

TL;DR: In this article, the tool wear when milling laser powder bed fused Ti6Al4V parts with four different build-up orientations was evaluated, and assessed indirectly by analyzing the chip morphology and the machined surface quality.

TL;DR: In this paper, the effect of shot peening and bainite morphologies on the wear and friction behavior of AISI 5160 steel specimens was studied by optical microscopy, scanning electron microscopy and X-ray diffraction.

TL;DR: In this article, the machining of Inconel 718 using novel formulations of coconut bio-based oil with enhanced nanoparticles and coco-amido-propyl-betaine.

TL;DR: In this article, the authors focused on the poor wear resistance of the AZ31 magnesium alloy and improving its tribological applications by adding nano-sized ZrO2 nanoparticles and increasing in FSP pass number.

TL;DR: In this article, AlCoCrFeNi high-entropy alloy (HEA) matrix coatings with Ag and BaF2/CaF2 eutectic were successfully fabricated by atmospheric plasma spray.

TL;DR: In this article, the influence of the drawing area on the tribological properties was studied using femtosecond laser processing of four kinds of chevron pockets of cemented carbides with 5.05, 9.5, 13.02 and 15.2% texture density.