The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper deals with the investigation of the tribological behavior of TiC/TaC reinforced NiCrMo and Mo plasma sprayed coatings. The coatings were classified with respect to friction and wear behavior in pin-on-disk tests. The NiCrMo-based coatings, with better carbide-metal matrix binding than the Mo-based coatings, are also the more wear resistant. The NiCrMo-based coatings show a better functionality,...
The wear mechanisms of steel 1080 and the wear behaviour of various microstructures in the steel were systematically studied by wear testing, and by SEM and TEM observations of worn surface and wear particles. The experimental results show that three dominant wear mechanisms appeared in succession with increasing normal load and/or speed during unlubricated sliding. The transitions of the wear mechanisms...
The plasma spraying of TiC-reinforced wear resistant coatings, and a study of their structure and tribological behaviour are the subject of this paper. HVOF WC-Co coatings, which are well established hard facing coatings, were investigated for comparison with the coatings tested in the present study. Based on scientific criteria, modifications of the carbide and the binder phase of the NiCrTiC system...
The wear behavior of steels 52100 and 1080 with different microstructures in dry sliding were systematically studied. The results show that in the region of mild wear there was no obvious difference in wear volume for the various microstructures. However, a considerable difference in wear volume (or wear rate) was observed for severe wear. The wear resistance of different microstructures is increased...
The wear micromechanisms of various microstructures in 52100 and 1080 steels were studied, using scanning electron microscopy, transmission electron microscopy, X-ray diffraction and microhardness indentation. The results show that the difference in wear resistance of various microstructures depends not only on differences in microstructural thermal stability, resistance to plastic deformation, resistance...
The wear mechanisms and their transitions of 52100 and 1080 steels with various microstructures in dry sliding were systematically studied by wear testing and SEM observations of worn surfaces and wear particles. The results show that there are three dominant wear mechanisms, i.e., mild wear characterized by oxidation, severe wear characterized by adhesion and delamination, and melting wear, appeared...
Wear in composites containing 8, 15 and 25 vol.% of titanium carbide (TiC) in a pearlitic matrix synthesized by solidification processing, has been tested under dry sliding in a block on ring Timken wear testing machine under loads of 131.8, 187.5 and 254.5 N and sliding velocities of 25.67x10 -2 , 41.07x10 -2 and 56.47x10 -2 m/s. The volume of wear varies linearly...
The effects of cold deformation on the dry sliding wear of RS/PM Al-10 wt.% Ti alloy have been studied at a low sliding speed of 0.66 m/s. It is indicated that the wear mechanism of the RS/PM Al-10 wt.% Ti alloy changes from adhesion to oxidation wear with the increasing applied load. At adhesive wear stage, wear resistance of the alloy decreases with the increase of the residual strain after cold...
The slide wear characteristics of a glass-epoxy (G-E) composite, filled with either rubber or oxide particles, were studied using a block-on-roller test configuration. Mass loss was determined as a function of sliding distance for sliding velocity between 0.5 and 1.5 m/s at three different loads of 42, 140 and 190 N. The worn surfaces were also examined by scanning electron microscopy (SEM). The study...
The dry sliding wear of spray deposited Al-6Cu-Mn alloy was studied as a function of applied load in the range of 5-400 N. The variation of wear rate with applied load was obtained, from which four regions can be observed. On the basis of observations and analyses on the worn surface, the worn subsurface, the wear debris and friction coefficient, wear mechanism in different regions has been identified...
Dry sliding wear behaviour of Fe-2Ni-0.47C (material A) and Fe-2Ni-0.2C (material B) powder metallurgy (P/M) alloys has been studied on a pin-on-disc wear tester using an alloy steel pin and disc of hardness HRC 62. The P/M alloys in the as sintered (~90 HRB) as well as in the hardened and tempered (~30 and ~40 HRC) conditions were investigated for their wear behaviour. Wear rate was found to initially...
The tribological behaviour of ductile iron heat-treated by two different procedures viz. quenching and tempering, and austempering to an identical matrix hardness of 445 KHN is compared. Wear tests were carried out using a pin-on-disc type apparatus under dry sliding conditions at a linear speed of 1.18 m s -1 . Applied load and sliding distance in the range of 7.5-30 N and 2x10 4...
The scanning electron microscope (SEM) features of glass fiber-epoxy composites subjected to sliding wear for distances ranging from 500m to 6km are recorded in this work. The results have shown that there is an existence of noticeable features on the worn surfaces. Thus for the longer run case interface separation is noticed, while for shorter runs matrix debris formation and occasional glass fiber...
An attempt has been made to investigate the tribological behavior of Al6061-garnet particulate reinforced composites prepared by liquid metallurgical technique. A pin on disc wear testing machine was used to carry out the tribological tests on both composites and matrix alloy over a load range of 10-50N and sliding velocities of 1.25-3.05m/s for various sliding distances of 0.5-3km. A theoretical...
High-nitrogen tool steels (Fe, 15% Cr, 1% Mo, 0.3% C, 0.3% N) are applied, e.g. in bearings and gears in aeronautics and space technology. Their advantage compared to conventional, nitrogen-free tool steels is a superior corrosion resistance, which can be attributed to Cr, Mo, and N dissolved within the solid solution. In order to gain a sufficient toughness for application, these steels are tempered...
The tribological behaviour of an AlSiMg–SiC p composite, produced by the PRIMEX CAST™ method (patented by LANXIDE) was studied under dry sliding conditions against a surface hardened AISI 1055 carbon steel, using a slider-on-cylinder tribometer. The effect on the wear resistance of both a T6 thermal treatment and of the use of recycled material in the casting process (50 and 100% recycling)...
The wear and friction behavior of aluminium matrix composites reinforced with short steel fibers has been investigated. The metal matrix composites were fabricated by liquid process using vortex method with commercially pure Al matrix reinforced with short plain steel fibers, copper-coated and nickel-coated steel fibers. A pin on disc type apparatus was employed for determining the sliding wear rate...
The work is based on the dry sliding wear of NiCrBSi coatings deposited on the plates of grey cast iron (DIN GG30) using the laser cladding technique, the parameters of which were such as to provide almost crack-free coatings with minimum dilution and very low porosity. The post-laser treatment microstructure showed up as a dendritic structure matrix which is a solid solution of Ni and chromium-rich...
Tribological behavior of aluminium matrix composite (AMC)/brake pad tribo-couple under dry sliding conditions was studied using Pin-on-Disc machine. Brake pad material was used as pins while the AMC formed the rotating disc. Series of experiments were performed to characterize the tribological nature of the tribo-couple. Load and sliding speeds were varied over a range to represent actual braking...
Corrosive species in various forms exist widely in the environment and can significantly affect wear behaviour of materials, usually accelerating wear. Under conditions where the environments are seemingly non-deleterious in terms of corrosivity, some species from the environment can still affect the tribological behaviour of materials. It is thus extremely important to recognise the roles of reactive...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.