Showing papers in "Tribology International in 1999"

TL;DR: Vibration measurement in both time and frequency domains along with signal processing techniques such as the high-frequency resonance technique have been covered and recent trends in research on the detection of defects in bearings have been included.

TL;DR: In this paper, the authors presented a wear simulation approach with commercial finite element software ANSYS, which is well suited for the solving of contact problems as well as the wear simulation.

TL;DR: In this paper, an investigation into the effect of fiber reinforcement on the friction and wear of PA66 in rolling-sliding contact is reported, and three types of short fiber composites were examined with the composites running against identical materials in a twin disc machine.

TL;DR: In this paper, a discussion of the relationship between chemistry and coating structure and tribological performance has been presented with emphasis on defect chemistry and multiple phase interactions, and speculations on the role of coating chemistry in determining coating performance in applications such as in ball bearings are presented.

TL;DR: In this paper, a comparative study of wear, friction, viscosity, lubricant degradation and exhaust emissions was carried out on a palm oil and a mineral oil-based commercial lubricating oil.

TL;DR: In this article, the effects of material properties, strain-rate sensitivity, and "barreling" on the behavior of friction calibration curves were investigated, and it was shown that every material possesses its own distinctive friction calibration curve.

TL;DR: In this article, the effects of soot contaminated engine oil on wear of engine components was examined using a statistically designed experiment using three oil properties studied were phosphorous level, dispersant level and sulfonate substrate level.

TL;DR: In this paper, the authors investigated the subsurface deformation in silicon induced by indentation and discovered new phenomena such as phase transformation to amorphous, bcc and tetragonal silicon, the emergence of planar defects and the onset of microcracking.

TL;DR: In this paper, a detailed sliding wear test of 30 min duration was carried out for the combination of a copper-impregnated carbon strip and a copper disk at a sliding speed of 100 km/h.

TL;DR: In this article, the phenomenon of erosion wear due to the cutting action of solid particles in solid-liquid mixture flows has been studied in a slurry pot tester in order to ensure that the erosive wear on the wear piece is primarily due to parallel flow of the mixture.

TL;DR: In this article, the effect of applied potential, load and frequency on the tribocorrosion behavior of a ferritic stainless steel in aqueous solution was investigated under sliding wear conditions using a reciprocating motion tribometer including an alumina pin sliding on a metal plate.

TL;DR: In this article, five kinds of PEEK/CF composites, made by blending poly-ether-etherketone (PEEK) with three kinds of PAN type carbon fibers (CFs) and two kinds of pitch type CFs respectively, were injection-molded into gears.

TL;DR: Adhesion is the mechanical force or strength required to separate the surfaces in contact as discussed by the authors, which has greatly contributed, and should continue to contribute, to tribological problems, such as high friction, solid-state welding, scuffing or scoring, high wear, and a short lubricant life.

TL;DR: In this article, the combined effects of couple stresses, fluid inertia and recess volume fluid compressibility on the steady-state performance and the dynamic stiffness and damping characteristics of hydrostatic circular step thrust bearings are presented theoretically.

TL;DR: In this article, the authors investigated the surface damage and material removal process during particle-wall collision of the solid particles and hard metal and cermet targets using a LDA measuring technique.

TL;DR: The fretting corrosion behavior of a 316L SS flat against a PMMA counterface has been investigated in an artificial physiological medium as mentioned in this paper, where a specific device has been used to visualize the in situ degradation at the contact interface.

TL;DR: In this paper, the influence of the roughness parameter (C) and roughness patterns (longitudinal, transverse and isotropic) on the steady state and dynamic characteristics of hydrodynamic journal bearings with rough surfaces has been studied using the model of Christensen and Tonder.

TL;DR: In this article, a Mo coating sliding against bearing steel specimen under boundary lubrication conditions was compared with hardened carbon steel sliding against boron cast iron, and the wear rates of the coating against a steel slider were lower compared with those worn against a cast iron slider.

TL;DR: In this paper, a case study describes an aspect of a real problem in sufficient detail for the engineer and scientist to understand the tribological situation and the failure The nature of the problem is analyzed and the properties are examined.

TL;DR: In this article, a theoretical study concerning the static and dynamic performance of a hybrid journal bearing compensated by a slot restrictor has been presented using the finite element method (FEM) and results have been presented for a double row symmetric as well as asymmetric configurations for different values of slot width ratios and external load.

TL;DR: In this article, the authors present a systematic analysis of wear particles contained in used lubricant of steam turbine-generator of a thermal power station using various sophisticated techniques such as automatic particle counter, ferrography, inductively coupled plasma atomic emission spectrometry (ICPAES), scanning electron microscopy and energy dispersive X-ray analysis.

TL;DR: In this paper, the authors compare the behavior of titanium nitride-coated and uncoated high speed steel tool inserts during turning and show that the extent of tool wear reduction due to the coatings depends strongly on the cutting speed and feed rate.

TL;DR: In this article, the tribo-systems with the composite materials containing TiC and TiB 2 differ significantly from the systems with the single phase SiC: the wear is reduced and the friction is increased.

TL;DR: In this article, a comparative AFM multi-scale roughness analysis of cold-rolled Al alloy and steel roll was performed to characterize the roughness transfer from the steel roll to the workpiece in cold strip rolling processes.

TL;DR: In this paper, the authors introduce two special approaches to simulate boundary lubrication tribochemistry, which use a dedicated analytical UHV tribotester allowing in situ AES/XPS analysis of both counterfaces and introduction of partial pressure of gases during friction.

TL;DR: In this article, the abrasion properties of a series of cemented carbides with different carbide grain sizes, different amounts and types of binder phases have been investigated under varied conditions.

TL;DR: In this article, the structural behavior of a typical elastomeric lip seal for pneumatic cylinders under actual working conditions is analyzed by means of both numerical and experimental methods.

TL;DR: In this article, the effect of non-Newtonian behaviour of lubricants, resulting from the addition of polymers, on the performance of hydrodynamic journal bearings is investigated.

TL;DR: In this paper, a local yield map showing the yielding position is introduced by using the finite element method and the criterion, where a critical range of yield strength ratio for the transition of yielding positions was found for 0.4∼0.5.