Showing papers in "Wear in 1966"

TL;DR: In this paper, it was shown that there is a close relation between the sliding friction at various speeds and temperatures and the viscoelastic properties of the rubber and that the lack of correlation with sliding friction must be attributed to the extremely high shear strains occurring at the interface during sliding.

TL;DR: In this article, an investigation has been carried out to study the variation of the volume of wear of different metals with variations of the mean diameter of abrasive particles (35-710 μ), the load (0.5-6 kg), the velocity of abrasion ( 0.032-2.50 m/sec) and the length of abarasion path (1.5 -6 m).

TL;DR: In this paper, it is suggested that embedding of suitably oriented crystallites of a lamellar solid into metal surfaces is a major factor in the formation of transferred films of the solids.

TL;DR: In this article, the impact of the deformation of an inflated tire against a hard, flat surface induces a symmetrical and inwardly-directed shear stress distribution at the ground contact.

TL;DR: In this paper, the initial stages in the deformation of junctions between sliding metal surfaces are investigated by examining metallographic sections cut through such junctions after various small amounts of relative tangential displacement of the surfaces.

TL;DR: In this article, a numerical method to treat the problem of stationnary rolling with slip and spin is proposed which is valid for any distribution of the contact area in areas of adhesion and areas of slip.

TL;DR: In this paper, a review of recent developments in the theory of rolling contact stresses is presented, which follow three main lines: elastic stresses due to slip and friction at the contact interface, pressures developed in elasto-hydrodynamic lubricating films and the influence of inelastic (visco-elastic or plastic) behaviour of the material of the rolling solids.

TL;DR: In this article, the effect of chemical attachment in boundary lubrication is strikingly demonstrated by the relative lubricating properties on aluminum of 1-cetene and cetane in thrust washer experiments.

TL;DR: In this article, the manner in which brittle insulating films on metal surfaces rupture during mechanical contact has been studied by means of a model and three distinct modes of cracking, which occur at different stages in the deformation, radial, circumferential, and finally an irregular crazing.

TL;DR: In this paper, it was shown that dislocations are mobile in titanium carbide crystals at 20°C and that, although bulk stresses are relieved by cleavage, the asperities are likely to be deformed in a plastic manner during sliding.

TL;DR: Wear and friction properties of austenitic manganese (Hadfield) steel were studied with two different sliding velocities under combined rolling, sliding and impact conditions using an Amsler wear test machine as discussed by the authors.

TL;DR: Sulfinuz salt bath treatment has been developed which is operated at 500-600 ° C and confers on ferrous materials a surface layer rich in sulphur and nitrogen and, in some cases, carbon.

TL;DR: A review of elasto-hydrodynamic full film lubrication (EHL) emphasises aspects of direct practical interest, outlines experiments on the application of EHL theory to machine components, and indicates interesting fields for further research as mentioned in this paper.

TL;DR: In the case of mild steel, the absence of atmospheric oxygen makes grinding almost impossible as discussed by the authors, and other reactive group VIA and VIIA compounds improve grinding performance even more than oxygen.

TL;DR: In this article, the authors present results of experiments on the investigation of the mechanism of the formation and destruction of adhesion junctions in friction at low rates of slip, and they find that the nature of the development of these junctions depends on the absolute and relative physico-mechanical characteristics of the materials of the bodies in frictional contact.

TL;DR: In a study of boundary lubrication, it was found that minor amounts of elemental iodine in hydrocarbons such as mineral oils are unusually effective in reducing friction with steel-on-steel as mentioned in this paper.

TL;DR: In this article, a sliding aluminum surface sliding on steel was lubricated with phthalic acid esters in the thin-film region, in order to determine if the ester-aluminum reaction products would protect the aluminum surface and result in extremely low wear rates.

TL;DR: In this paper, an instrumentation to measure the formation of electrical charges and the increase in temperature when impacting steel spheres on steel plates, has been developed; the spheres were 1-2 mm diam and the steel plates were of 190 and 725 kp mm −2, HV 10 hardness; the speeds varied between 45 and 70 msec −1.

TL;DR: Iodine charge transfer complexes have been investigated as boundary lubricants for stainless steels and low carbon steels as discussed by the authors, and the effect of iodine concentration on both friction and wear has been evaluated for a number of steels.

TL;DR: In this paper, it was found that blisters only occur when a certain thickness (about 3-7 μ) of transferred graphite is exceeded, and that this thickness is probably never attained unless the slip-ring or commutator surface is exceptionally rough.

TL;DR: In this article, the authors measured the coefficient of friction of steel balls rumbled or impacted in MoS2 or graphite to determine the quantity of powder adhering to their surfaces.

TL;DR: In this paper, it was shown that the high transient temperatures observed during the rubbing of metals on sand-blasted glass are due mainly to the recovery from deformation of small pieces of glass which had previously been sheared from the glass disc and now lie on the surface of the metal slider.

TL;DR: In this article, a relatively smooth steel ball was subjected to combined normal and tangential surface tractions over a wide range of loading and it was found that the measured creep is only marginally dependent on the degree of surface roughness.

TL;DR: In this paper, a short general survey of the different lubrication states of spiral-groove bearings is presented, followed by a detailed discussion of the mechanism of full-film lubrication.

TL;DR: In this article, the authors show that shear forces in the sapphire-steel interface can be reduced with increased sliding speeds, and the high temperatures generated at the higher sliding speeds appear to promote chemical reactions, the products of which serve to decrease the shear force in the interface.

TL;DR: In this paper, the behavioral characteristics of suddenly-squeezed castor oil films between convex steel surfaces were studied from the points of view of obtaining a continuous picture of the minimum oil film thickness, the maximum load-carrying capacity and the maximum pressure developed within the films, and the viscosity of the oil.