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Mechanical and tribological properties of barium boroaluminosilicate glass (commercial AF45® glass) treated with a thermal poling process employing 4kV bias at 600°C were studied. Compared to the pristine AF45 glass, the anode-side surface of the thermally poled glass has lower modifier ion concentrations and lower reduced modulus and hardness, while the cathode-side surface has increased modifier...
In order to achieve the maximum benefit from the carbide-forming elements Ti and Nb, it is very important to have a better understanding of the strengthening mechanism of the two carbide-forming elements in the hardfacing alloy.The Fe-Cr13-C-Nb hardfacing alloy with and without Ti addition were deposited respectively on carbon steel substrates by shielded metal arc welding. The carbide-forming elements...
In order to obtain higher wear resistance steel for the application in mining machines, new modified medium manganese austenitic steel (MMAS) was developed. The impact abrasive wear properties were investigated on MLD-10 impact wear test equipment. The wear resistant and strengthening mechanisms of MMAS were analysed by SEM, TEM and XRD observation. Our research results show that the wear mass loss...
In the present study, the properties of thin coatings deposited on biocompatible 316L steel to improve the wear resistance were investigated. A thin Ti nanolayer of thickness 400nm was deposited by thermal evaporation (sputtering), and the Ti-coated steel was subjected to plasma oxidation treatment for different times. All the samples were characterized using metallographic techniques, scanning electron...
Laser alloying with boron and solid lubricants (CaF2 or BaF2) was used in order to produce the self–lubricating layers on 100CrMnSi6–4 bearing steel. The surface of the base material was coated with a paste consisting of alloying material blended with a diluted polyvinyl alcohol solution. Then, this surface was re-melted by the laser beam using TRUMPF TLF 2600 Turbo CO2 laser. The produced layer consisted...
This paper reports on investigations of wear characteristics of the Stellite 6 coating on AISI 4130 steel substrate using micro-plasma transferred arc (µ-PTA) powder deposition process. Effects of plasma power, powder mass flow rate and travel speed of worktable have been studied in terms of secondary dendritic arm spacing, microstructure, dilution, line scan analysis and microhardness for enhancement...
The paper considers the effect of the anode plasma electrolytic treatment (PET) on tribological properties of steels after their boriding (PEB), nitriding (PEN), and nitrocarburising (PEN/C). Electrolyte compositions and processing temperatures improved wear resistance of samples under dry friction condition using a ball-on-disk test with an Al2O3 ball as counter-body are determined. The anode PEB...
Mill roller shells are amongst the most important manufacturing-line elements in the sugar production process. They are carefully designed according to many surface criteria amongst which wear resistance is the most important. To increase the life of the mill roller shells, the resistance of the surface to failure by abrasion should be increased. In this investigation, a series of sixty-six cast iron...
PLA/Talc bio-composites are very promising materials for the fabrication of food and drug containers, packaging items, medical devices, consumer electronics as well as car components. In this work, wear resistance of PLA/talc bio-composites was investigated. Different types of formulations were analysed and, in particular, different compatibilization strategies of the hydrophilic talc with the hydrophobic...
Cobalt-chromium alloys are known for their excellent wear resistance. Many studies on the wear behavior of these alloys were reported in literature. Nevertheless, microabrasive wear still lacks extensively investigation. Microabrasive wear behavior, of three experimental cobalt alloys, was investigated: Alloy 1 similar to Stellite 250, 48wt% Co, 29wt% Cr, 19wt% Fe; Alloy 2 similar to Stellite 6, 64wt%...
Cemented carbides used in excavation tools have to feature particular mechanical properties to withstand impact loads and abrasive degradation processes. It is assumed that a high fracture toughness is important to counteract brittle material failure due to forced rupture (supercritical loads) or material fatigue caused by subcritical impacts or cyclic loads. The fatigue-induced failure mechanism...
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