Showing papers in "Wear in 1970"

TL;DR: In this article, the effects of velocity and dust characteristics on sand erosion are summarised and new data presented, which leads to the suggestion that impacting particles initially cause pitting and extrusion and may break into fragments which cause secondary damage in directions radial to the point of initial impact.

TL;DR: In this article, the authors brought up-to-date the known facts concerning the mechanism of fretting wear in metals with special reference to the common engineering materials iron and steel under normal conditions.

TL;DR: In this paper, an empirical wear equation is proposed for predicting material losses of asbestos-reinforced polymers caused by sliding against metal surfaces, which has been tested with four different kinds of friction pairs and found to correlate extremely well with the experimental results.

TL;DR: A review of the work carried out by the author and his colleagues at the British Petroleum Research Centre on the load-carrying action of organo-sulphur compounds is presented in this paper.

TL;DR: The tribological properties of carbon fiber reinforced resins are determined by the inter-related effects of two major factors; the type of carbon fibre and the nature of the counterface material as mentioned in this paper.

TL;DR: In this paper, a statistical model for predicting the erosion of both ductile and brittle target materials was developed on the basis of laboratory erosion tests and the impact and rebound velocities of selected particle size components of two contaminants were measured photographically with the aid of a high-speed flash light source.

TL;DR: In this paper, the effect of the stylus radius on the measured roughness values was investigated and the results obtained from a theoretical analysis of two-dimensional surface profiles were given.

TL;DR: In this paper, structural changes produced in various materials by rolling contact fatigue under various conditions are classified into four types (dark tint, dark needle, dark line and white band), depending upon test temperature, tempering resistance of the material, contact stress and loading cycle.

TL;DR: In this paper, a non-linear relationship between abrasive wear of thermoplastic polymers and their cohesive energies was found, provided that plastic deformation predominates during the wear process.

TL;DR: In this paper, a pin-and-disc wear test machine was used to measure the running-in coefficient of two steels, nominally 0.3% C-3% Cr, and a mechanism for the scuffing resistance of these steels containing 3% Cr was presented.

TL;DR: In this paper, it was shown that fine abrasive polishing operations can occur by a mechanical mechanism in which very small chips are cut, and the difference between polishing and abrasion in this respect was only one of degree.

TL;DR: In this paper, a statistical analysis is made of the geometrical nature of contacting surfaces and mathematical expressions are deduced for the number and the mean area of the real contact points, first in generally applicable forms, and numerical examples are given for the case where Gaussian distribution is assumed for the height and the slope of asperities.

TL;DR: In this paper, the wear rate for continuous and reciprocating sliding was compared on a low-carbon steel under similar conditions of load, speed and nominal area of contact in order to compare the wear rates for the two sliding modes.

TL;DR: In this paper, a solution of the basic equation of the flow-dynamic lubrication concerning porous bearings under steady radial load is given, which has been modified because the axial dimension of the bearing is considered as undefined.

TL;DR: In this paper, a pin-and-disc wear machine was used to produce the W 2 white layer which is found on cast iron rings and liners from “scuffed” engines.

TL;DR: In this paper, a fractographic analysis was made of spall cavities and fragments of 1 2 in SAE 51100 ball fatigue samples generated on a Barwell four-ball rig.

TL;DR: In this article, an exploratory investigation of composite material cages for in situ lubrication of rolling bearings has been carried out using an accelerated service simulation test, and the results revealed fine-scale features useful in the interpretation of the lubricating action and failure mechanisms of the composites.

TL;DR: In this article, the friction of isotactic polypropylene and high-pressure polyethylene in contact with steel was studied simultaneously with the resistance of the polymer specimen to tear-off from steel over a wide range of temperatures.

TL;DR: In this article, the effect of road surface characteristics on tire wear was investigated on the performance of a front wheel on the track of the Road Research Laboratory track. But the results showed that increase in roughness of the surfaces had a relatively small effect on wear, the major factor being surface harshness.

TL;DR: In this paper, the authors proposed to solve the problem in terms of an ordinary differential equation and solve for the load capacity by making reasonable assumptions for the pressure profile in the axial direction.

TL;DR: In this article, a range of diester disulphides was synthesised and their extreme-pressure and anti-wear properties assessed using the Four-Ball machine, and it was suggested that the prime requirement for improving the antiwear properties of organo-sulphur compounds is the presence of strongly adsorbing groups at both ends of the molecule.

TL;DR: In this article, electron probe microanalyser was used to study the pickup of abrasive particles in annealed aluminium during abrasion on silicon carbide abrasive papers.

TL;DR: In this paper, it was observed that when a lubricant which is moderately oxidized is applied to the sliding surface of cast iron, the lubricant is retained by the graphite particles on the surface of the cast iron and the oxygen in the lubricants moderately oxidizes the surface and improves its wear resistance.

TL;DR: In this paper, a theoretical analysis is made of factors thought to affect the life of ball bearings in aircraft electrical generators and a method is given for predicting the bearing environment from given initial dimensions and ambient conditions.

TL;DR: In this article, the authors investigated the behavior of some commercial alloys in order to obtain data for the selection of bronzes for seals and bearings in reciprocating machinery, using a Dow-Corning LFW-1 friction and wear testing machine.

TL;DR: In this paper, the effect of shaft misalignment on cage stress was measured using strain gauges and direct static measurements of ball-to-track friction were also made for different interference fits of the races.

TL;DR: In this article, the formation of gases by sliding friction of self-lubricating material, Teflon filled with 25% carbon black, was investigated and the quantity and the composition of the gases evolved determined.