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The aim of this work was to study the wear behaviours and mechanisms of Ti-based coatings deposited by a filtered cathodic arc process on fishing net-weaving machine components, namely hooks, under dry soft-sliding against nylon fibres. A set of dry soft-sliding experiments were conducted on AISI 316 stainless steel hooks with filtered cathodic arc-deposited TiN, TiAlSiN and TiCrAlSiN films along...
The rolling contact fatigue between railway wheel and rail is a critical theme. It is very important to evaluate and monitor RCF damage between a railway wheel and rail to prevent derailment and increased maintenance costs. The electro-magnetic array technique was applied in rolling contact fatigue tests using a twin-disc tester under constant speed to detect the damage processing. The applied sensor...
In this work, titanium silicon nitride (TiSiN) hard ceramic coatings were deposited on Ti-6Al-4V bio-alloy to improve its wear and corrosion resistance via pulsed-DC plasma-assisted chemical vapor deposition (PACVD) method. The results showed that TiSiN coatings are composed of TiN nano-crystallites embedded in the amorphous SiNx matrix. Increasing the Si content of coating from 0 to 25.1wt%, leads...
A common challenge in multiple fields of the mechanical driveline technology is the premature failure of rolling bearings due to white etching cracks (WEC). This failure mode is characterized by three-dimensional cracks, bordered by regions of altered material microstructure, which eventually lead to cracking or spalling of the raceway. Ultrasonic analysis of cylindrical roller thrust bearings have...
Ti6Al4V has extensive uses in the marine and biomedical industry. In some of these applications, corrosion is present with additional mechanical wear. Thus, the corrosion, wear and their synergistic properties were investigated in applications where there were specifically induced material property changes, such as in welding. One such welding technique, friction-stir-welding, is a well-suited method...
With the increased usage of Advanced High Strength Steels, galling wear has become a significant challenge for sheet metal stamping industries. Galling, in particular, can have a large economic impact due to the high costs and lost productivity associated with manual monitoring, refinishing/resurfacing damaged tooling and formed parts, and the need to apply expensive treatments or coatings to tool...
Erosion-corrosion is responsible for severe damage and high maintenance costs in many industrial operations involving slurry handling such as oil sands and mineral processing. While tungsten carbide reinforced Ni-based alloy overlays are frequently used for applications requiring extremely high wear resistance, they tend to suffer from extensive carbide degradation during the weld cladding process...
In this study, a numerical model based on the finite element technique was developed to study the effect of temperature on the erosion mechanism of material removal during solid particle impact on polyurethane elastomers. The hyperelastic, isotropic hardening, and Mullins damage criteria were chosen as the material model formulations to account for elastic, plastic, and stress softening behavior of...
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...
Protective coatings have been gaining prominence in research related to graphene based compounds over the recent years. The present study aims to reveal the novel anti-corrosive properties of the coatings achieved by co-depositing the carbon allotropes. Electroless Ni-P-rGO coatings were successfully obtained on low carbon steel substrates by adding various concentrations of rGO particles to the conventional...
Thermal barrier coatings (TBCs) with high brittleness usually exhibit uncertain lifetime due to their scattered mechanical properties and severe service conditions. Here we establish a method of assessing the reliability and the dominant parameters affecting the reliability of TBCs deposited onto a turbine blade substrate during erosion by a hot gas stream. An erosion rate model is established to...
Ultrasonic assisted magnetic abrasive finishing process (UAMAF) is a precision manufacturing process that results nano-scale level finish in a part. Normal force on a particle helps indenting the particle in the work surface whereas horizontal force provides finishing torque that in-turn helps the particle to perform micro-machining. Better understanding of the effect of these forces on material removal...
Dry sliding wear behavior of rheocast AZ91 magnesium alloy and AZ91/SiCp composites reinforced with 5 and 10vol% SiC particles were investigated under normal loads of 10–250N and sliding speeds of 0.1, 0.3, 0.5 and 1m/s using pin-on-disc configuration against a 1045 steel disc counterbody. In this work, rheocast alloys and composites have been tested to determine the role played by the globular microstructure,...
Due to the urgent demand for the development of new materials with high performance and relatively low cost, materials with varying vanadium (V) and chromium (Cr) content were developed by reducing the content of V, Cr and nickel (Ni) in the present study. The erosive wear performance of these materials after heat treatment was investigated at elevated temperatures (873K and 1173K). Alumina spheres...
High chromium white cast irons (HCCI) with high hardness and abrasiveness owing to a particular combination of hard primary and eutectic carbides were used as workpiece materials for longitudinal turning with binderless cBN (bcBN) and high cBN (hcBN) tools. The materials with low and high Si content were used in as-cast and quenched states. Binderless cBN is prone to cratering and flank wear, while...
A general methodology is proposed and demonstrated for modeling the progression of crater wear on cutting tools used for steel machining. Dimensional analysis and Finite Element Analysis of metal cutting are the foundations of this new approach. The dimensional analysis resulted in a differential equation which describes wear rate as a function of dimensionless variables. Numerical models of cutting...
The diffusion wear between a WC-10%Co tool and a Ti54M titanium alloy was investigated by studying the reaction between both the materials using a diffusion couple and studying their behavior during a machining test. In addition to the scanning electron microscopy (SEM) study, electron probe microanalysis (EPMA) was conducted to quantitatively analyze the chemical composition in the reactive layers...
Friction materials used to manufacture railway brake shoes are assessed with consideration of a wide variety of their functional, frictional and mechanical properties. To meet the versatile requirements posed by brake system manufacturers and railway operators, formulation of contemporary organic composite friction materials are fairly complex containing in some cases even more than a dozen different...
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...
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