Showing papers in "Wear in 1999"

TL;DR: An alternative numerical method for solving contact problems for real rough surfaces using a single-loop iteration scheme based on the conjugate gradient method, which converges for arbitrary rough surfaces.

TL;DR: The wear mechanisms and wear rates were investigated over a range of loads (01 to 50 N), slurry concentrations (0000031 to 024 volume fraction abrasive) and abrasive materials (SiC, Al 2 O 3 and diamond).

TL;DR: In this article, the performance of conventional and nanostructured materials in the form of coatings deposited by high velocity oxy-fuel (HVOF) thermal spraying was examined, and it was found that the nanocomposite had a poorer wear resistance than the conventional coating under all the conditions examined.

TL;DR: Hexagonal boron nitride (BN) has a graphite-like lamellar structure, but has been considered less effective than other solid lubricants except for high-temperature applications.

TL;DR: In this paper, inorganic fullerene-like (IF) supramolecules of metal dichalcogenide MX2 (M=Mo, W, etc.; X=S, Se), materials with structures closely related to (nested) carbon fullerenes and nanotubes have been synthesized.

TL;DR: In this paper, the dry sliding wear behavior of the Ti-6Al-4V alloy sliding against itself and AISI M2 steel was investigated at different sliding velocities (between 0.3 and 0.8 m/s).

TL;DR: In this article, two sets of brake pads were subjected to brake tests in a special test rig and the correlations between squealing and the number of contact plateaus, their size and the total contact area were investigated.

TL;DR: In this article, the authors provide guidance and reconciliation between analytical and computational models and empirical observations by plotting wear maps for specific materials so that the dominant wear mechanism for particular operating conditions can be established and some indication provided on probable wear performance.

TL;DR: In this article, the effect of the interface topography, coating thickness and elastic mismatch on the interfacial stresses is investigated. And the authors demonstrate that the high residual stress in ceramic coatings may cause local coating fracture and delamination at the tip of an edge or at rough substrate surfaces when the coating is thick relative to the edge radius or the surface topography.

TL;DR: In this paper, the authors describe the background theory, various areas of application, techniques for producing controlled impacts in the laboratory for the velocity range from a few meters per second to several thousands of metres per second, the use of high-speed photography for studying such impacts, and the damage processes in the solid.

TL;DR: In this paper, a multiaxial stress-strain plasticity model was used in the calculations of the contact stress and strain fields for Hadfield steel and Bainitic alloy.

TL;DR: In this paper, the performance of 10 high velocity oxy-fuel (HVOF) sprayed coatings has been evaluated under both dry particle and slurry erosion conditions at 90° and 20° impingement angles.

TL;DR: In this article, the authors compared the erosion behaviour of thermally sprayed and electron beam physical vapour deposited (EB-PVD) TBCs at particle velocities up to 300 m/s at test temperature up to 920°C.

TL;DR: In this article, the authors investigated some of the problems associated with determining the ''three-body'' (rolling particle) abrasion resistance of soft materials such as polymers and soft metals.

TL;DR: In this paper, the degradation of carbon steel sliding against alumina was investigated in borate solution of pH 8.4 using a reciprocating ball on plate wear test rig equipped with an electrochemical cell.

TL;DR: In this paper, the influence of pressure and temperature on viscosity, limiting shear stress and density, has to be taken into account when creating lubricant models to be used in numerical calculations of film thickness and friction.

TL;DR: In this paper, a 3D version of the structure function is presented, any section for which is equivalent to an ensemble average of profile structure functions, and the angular variation of topothesy and fractal dimension obtained from such sections describes the anisotropy of the parent surface.

TL;DR: In this paper, the authors describe the active mechanism of the dry-ice blasting process, the impact force, as well as the diameter and velocity of the CO 2 -pellets in the jet.

TL;DR: In this article, the influence of the disc topography on the generation of automotive disc brake squeal has been studied and two brake discs were shot-blasted to produce small pits in the disc surface.

TL;DR: In this article, a numerical model has been developed that predicts the dynamics, lubrication and wear of piston rings interactively for the first time, and the application of this new model to the piston ring pack of a diesel engine.

TL;DR: Amorphous Pb-Mo-S coatings were found to be quite wear resistant; no more than 25% of the coating thickness was removed by 10,000 sliding cycles as mentioned in this paper.

TL;DR: In this paper, solid particle erosion tests on four materials have been performed using seven different erodents within a range of particle diameters D (63 to 1000 μm), velocities V (33 m s −1 to 99 m s−1 ) and impact angles α (30° to 90°).

TL;DR: In this article, the performance of finite journal bearings with a fluid with couple stresses taking into account the elastic deformation of the liner was investigated. And the effect of couple stresses on the bearing characteristics is significantly apparent.

TL;DR: In this paper, an internal magnetic abrasive finishing process was proposed for producing highly finished inner surfaces of tubes used in critical applications including clean gas or liquid piping systems, and the microscopic changes in the surface texture resulting from processing were examined.

TL;DR: In this article, the two-body abrasive wear behavior of aluminium matrix composites reinforced with silicon carbide particles has been investigated, and it was shown that SiCp particles reinforcement improved the abrasion resistance against all the abrasives used.

TL;DR: In this paper, Ni-P composite coatings containing SiC particles and PTFE, MoS 2 and BN particles, to reduce friction, were produced on a steel substrate by means of electroless deposition, and the dry sliding behavior against a steel counterface (made of AISI M2) was found to develop through two stages (indicated with stage I and II).

TL;DR: In this article, the authors evaluated the microhardness and abrasion wear resistance of reinforced Ti composites by vacuum sintering at 1400°C for 2 h. The ranking of wear resistance was as follows: (hardest, most wear resistant) Ti+Si3N4 (i.e., α-Ti(N), +Ti5Si3, Ti3Si, and Ti2N)≫Ti+TiB2≫ Ti+TiC (softest, least wear resistant), with the exception of the Ti+2.5

TL;DR: In this paper, the effect of the pattern on the sliding friction was examined with a pin-on-disk tribometer against a steel ball, and the results showed that the life of the laser-patterned sliding increased considerably for the laser patterned sapphire, but that the patterned surface was more abrasive than the original highly polished surface.

TL;DR: In this paper, the authors present a state of the art of nanoscale tribophysics and tribomechanics for nanofabrication/nanomachining purposes, including the use of AFM/FFM techniques for tribological studies at scales ranging from atomic and molecular to microscales.

TL;DR: In this paper, the suitability and limitations of carbon fiber reinforced polyether ether ketone (PEEK) composites as bearing surfaces for total joint replacements are investigated under both high-stress non-conforming contact and low-stress conforming contact conditions.