Study Of Wear Characteristics Research Articles

Study of wear characteristics under conditions of dry sliding friction of 08Kh18N10T steel after electrolysis-free boriding

Effect of liquid electrolysis-free boriding on tribotechnical characteristics of 08Kh18N10Т steel is studied. It is established that after boriding at temperature 900 °С and 5 h soaking it is formed a boride two-phase layer with thickness of 30...35 microns and transition zone with thickness of 10 microns. The microhardness in FeB and Fe2B phases is 2000...2100 and 1800...1900 HV 0.1 respectively. The wear tests under dry friction conditions showed that coefficient of friction for specimens made of 08Kh18N10Т steel without treatment and with boriding in pair with counterbody made of ShKh15 steel is 0.83 and 0.85 respectively. At the same time, the wear intensity of samples with boration is an order of magnitude less than that of samples without treatment, and on average is 7.7 · 10–6 mm3 /(H · m) instead of 8.5 · 10–5 mm3 /(H · m). The average depth of the wear track of the sample with boriding is 5 times less than that of the sample without treatment.

Design and Fabrication of Pin on Disc Apparatus and Study of Wear Characteristics of Aluminium on Stee

Design and Fabrication of Pin on Disc Apparatus and Study of Wear Characteristics of Aluminium on Stee

A Study of Microstructure and Tribological Properties of Stir Cast Al Metal Matrix Composite

An attempt has been made to develop and characterize Al 5083 alloy with SiC reinforcement by using stir casting technique. In case of MMC’ aluminum matrix composite dues, their high strength to weight ratio, low cost and high wear resistance are widely manufactured and used in structural applications along with aerospace and automobile industry. The study of wear characteristics and mechanical properties on Aluminium Matrix Composites (AMCs) reinforced with silicon carbide (SiC) particles are carried out. In this composite Al 5083 is used as matrix material with varying quantity of SiC of 3%,5% and 7 Wt%. The composite were fabricated by using Friction stir casting (FSC) method. The friction and wear characteristics of the composite is investigated under dry sliding condition and compared with original aluminium alloy. The wear test is carried out by using pin on disk method at normal loads and at constant velocity. The wear mechanism of composites and original alloy is compared by using scanning electron microscope (SEM) image of the worn surfaces.

A Study of Wear Characteristics of Superpolished Orthopaedic Implant Materials Using Ultra-Precision Polishing

Ultra-precision polishing is an emerging technology for producing superfinishing surfaces with sub-micrometer form accuracy and surface finish in nanometer range. It has been applied in superpolishing the freeform bearing surfaces of orthopaedic implants. It is believe that the superfinished surfaces are capable of prolonging the life of the implants. In this paper, an experimental investigation of ultra-precision polishing of orthopaedic implants and the study of the wear characteristics of the superfinished surfaces using a multi-directional pin-on-plate wear test simulator are implemented. Tests were carried out over 3 million cycles using Zeeko IRP200 superfinished cobalt chrome pins articulating against cross-linked UHMWPE plates. The results were compared to that of manually polished pins articulated against the same UHMWPE material. The results show that the Zeeko IRP200 polished pins produced better wear performance that that of the manually polished pins.

Study of wear characteristics and solid distribution in constant area and erosion-resistant long-radius pipe bends for the flow of multisized particulate slurries

The wear characteristics of three types of long radius pipe bends in the flow of multisized particulate slurries have been extensively studied. Conventional long radius bend, and two types of diverging-converging bends are investigated. Measurements have been made over a range of solid concentrations and flow velocities. The results have shown that diverging-converging bend with an area ratio 2 exhibits reduced wear. and in fact can even be expected to have a longer life than a straight pipe. Further, measurement of solid distribution in the three bends has given some insight into the causes for the reduced wear in these modified bends. It has also been demonstrated taht the diverging-converging bends even with enlarged cross-sections are not prone to choking when the pipeline is operating near critical deposition velocity.

A study of the wear characteristics of sliding paris of high density polycrystalline aluminium oxide with particular reference to their use in total replacement human joints.

The introduction of ceramic components into total replacement joints for the human body in the last decade has attracted considerable attention. In most cases in which a ceramic component is used a ceramic femoral head is located on a metallic femoral stem, whilst the acetabular cup is made from ultra high molecular weight polyethylene. In some designs a ceramic acetabular cup is used in association with the ceramic femoral head. A study of the basic wear characteristics of sliding pairs of high density polycrystalline ceramics is reported in this paper. Tests have been carried out under both ‘dry’ and ‘wet’ (distilled water) conditions in a tri-pin-on-disc wear testing machine. It is shown that sliding pairs of alumina ceramics exhibit remarkably low wear under dry conditions when subjected to small loads, but that high loads lead to rapid deterioration of the interacting surfaces and the onset of very high wear rates. The presence of distilled water generally permits smooth sliding at higher loads than are possible under dry conditions, but the wear rate increases by a factor of about ten over those encountered at low loads in air. The slight advantage of sliding pairs of alumina over high density polyethylene sliding on stainless steel as far as wear is concerned is not evident if the comparison is made with high density polyethylene sliding on high density ceramic in the presence of distilled water.