Showing papers in "Wear in 1983"

TL;DR: In this article, a new theoretical model is proposed for the erosion of metals by particles at normal incidence, which employs a criterion of critical plastic strain to determine when the material will be removed, defined as the strain at which the deformation in the target localizes and hence results in the lip formation.

TL;DR: In this paper, the effects of erodent composition, hardness-strength characteristics and shape on the erosion of AISI 1020 carbon steel were determined at a velocity of 80 m s −1 at two angles of impingement (α = 30° and 90°).

TL;DR: In this article, structural and chemical information has been obtained by using optical microscopy, scanning electron microscopy (TEM), scanning TEM and fluorescence analysis using energy-dispersive techniques (energy-disperive analysis of X-rays) and wavelength analysis.

TL;DR: In this paper, the wear behavior of nitrogen-implanted Ti-6Al-4V was studied using a pin-on-disc wear tester and it was shown that under suitable conditions, nitrogen implantation may reduce the wear rate by over two orders of magnitude.

TL;DR: In this article, a series of tests were undertaken on different pump materials to study the effect of slurry properties and pump material on abrasion wear using a test facility which incorporates most of these parameters.

TL;DR: In this article, the authors consider abrasive and erosive wear as a consequence of a series of impacting strikes within a given stress range, and demonstrate the advantage of materials with high work-hardening rates.

TL;DR: In this paper, the erosion behavior of a plain carbon steel (AISI-SAE 1020), an austenitic stainless steel (type 304), and a low alloy steel was determined in various heat-treated conditions.

TL;DR: In this paper, a new cutting geometry consisting of a high clearance angle (from 10° to 15°) together with a high negative rake angle ( from −10° to −15°) is proposed for increasing cemented tungsten carbide tool life during the machining of titanium alloys.

TL;DR: In this article, an analytical model for the computation of metal erosion by a single spark in electrical discharge machining is presented, and the effect of plasma channel growth on metal removal is examined and good correlation was found between theoretical and experimental results.

TL;DR: In this article, the wear of polyethylene in bovine serum was evaluated as a function of load and molecular weight, and it was proposed that the behavior of these materials be described in terms of a critical pressure-velocity product.

TL;DR: In this article, the role of carbide volume fraction (CVF) in developing abrasion resistance was investigated using a series of alloys with varying CVF but with constant matrix and carbide compositions.

TL;DR: In this paper, the growth morphology of sputtered MoS2 films was analyzed and it was shown that morphological properties can be influenced by the parameters of the deposition process; in particular, it is possible to prepare coatings in which the lamellae are oriented parallel to each other.

TL;DR: In this paper, the wear behavior of thermoplastic polymers was investigated and the relationship between the combined stresses in the interfacial area and the tensile or rupture strength of the polymers studied was established.

TL;DR: In this paper, the effect of corundum particle content on the wear of aluminium was studied and the mechanism of reinforcement and its effect on the operative wear mode were discussed. But the wear decreased as the oxide content increased, showing an optimum value at a composition range of 25 wt.% −35 wt%.

TL;DR: In this article, the wear characteristics of continuous graphite fiber-epoxy compo were studied on a Falex wear tester by sliding composite rings with var fiber orientations against conforming steel blocks under normal pressure 126 Ibf in −2 and a surface speed of 0.6 m s −1.

TL;DR: In this paper, surface ploughing of a rigid-plastic semi-infinite body by a rigid pyramidal indenter is modelled by using a velocity field calculated by minimizing the dissipated power.

TL;DR: In this article, the interactive effects of abrasion and corrosion were studied as a function of abrasive load, corrosion time and the frequency of abrasives and corrosive treatments.

TL;DR: In this paper, continuous glass-fibre-reinforced epoxy composites were fabricated and their wear behaviour was studied and a rapid drop in the wear loss occurred with an increase in the sliding speed for the pure epoxy resin while the reinforced sample exhibited a mild decrease, a flat region and then a rise Optical microscopy examination indicates that the higher wear loss for the composite at higher speeds could be due to loss of glass fibres.

TL;DR: In this article, a pin-on-disc machine was used to wear Al-Si alloy pins under dry conditions and the surfaces of the worn alloys were examined by scanning electron microscopy to identify distinct topographical features to aid elucidation of the mechanisms of wear.

TL;DR: In this paper, detailed observations of the mechanism of material removal in aluminium alloys eroded at normal incidence by spherical particles are reported, including surface ripples of uniform wavelength and formation of platelets on the surface.

TL;DR: In this article, a column of abrasive contained in a tube and pressed against a rotating metal disc was examined as a function of the length of the wear path, load, speed and abrasive size, abrasive hardness, metal hardness and temperature.

TL;DR: In this article, a linear relation was obtained from the logarithmic curve between the reciprocal of the maximum mass loss rate and H v 2 / Eβ g (where H v is the Vickers microhardness, E is the elastic modulus and β g is the fatigue strength reduction factor for cast iron).

TL;DR: In this paper, the effect of the stiffness of the MCW system elements on tool wear was investigated and it was shown that the increase in tool wear rate due to the presence of vibration is mainly governed by the stiffness properties of the components responsible for the high frequency components of the vibration spectrum.

TL;DR: In this article, the authors conducted extensive scanning electron microscopy examination of eroded surfaces, erosion debris and metallographiic sections, together with transmission electron microscope examination of debris and eroded surfaces and proposed a threshold particle size for hill and valley formation.

TL;DR: In this article, a short-duration vibratory horn tests in tap water were made on soft aluminum alloy (aluminum alloy 1100-O) and also on a much more resistant alloy (316 stainless steel).

TL;DR: In this paper, the use of wear particle size distributions as a means for distinguishing different modes of wear and determining its transitory behaviour is evaluated in terms of the quantitative analysis of Ferrograms by Quantimet.

TL;DR: In this article, the effect of ambient pressure on the friction and wear of 0.45% C steel at various atmospheric pressure levels was investigated and the relationship between the coefficient of friction and oxide thickness was analyzed analytically.

TL;DR: In this paper, the intermolecular bonding energies of polymeric materials can be employed in the evaluation of sliding under conditions determined predominantly by adhesion, and the effect at the interface of these energies can be evaluated by reference to the surface energy and to its polar and dispersion-related components.

TL;DR: In this paper, an attempt is made to assess the primary factors responsible for the high wear rates in cylinder liners, and it is observed that although several factors can operate at the same time in influencing the wear process, wear is controlled by adhesion with contributions later on from corrosive and abrasive processes.

TL;DR: In this article, the authors proposed a theoretical model to predict the extent of lip formation and subsequent lip fracture on ductile targets, based on localization of deformation in the near surface regions of the target and that the lip is removed either by inertial-stress induced tensile fracture or by separation across adiabatic shear bands formed at the base of the lip.