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It is well known that abrasive wear resistance is not strictly a materials property, but also depends upon the specific conditions of the wear environment. Nonetheless, characteristics of the ceramic microstructure do influence its hardness and fracture toughness and must, therefore, play an active role in determining how a ceramic will respond to the specific stress states imposed upon it by the...
A series of composites based on the Cr–Cr 3 Si system, and containing between 50 and 100%Cr 3 Si, were fabricated by hot pressing. These composites have high stiffness, good thermal conductivity, excellent chemical resistance, and high temperature creep and oxidation resistance, making them potential candidates for hard-facing applications and cutting tools in harsh environments. In...
The abrasive wear resistance of ductile cast iron with different matrix microstructures (ferrite, pearlite, bainite and martensite) was studied under instrumented single-pass pendulum sclerometry testing. This technique uses only one abrasive particle with known geometry and the abrasive wear event can be isolated, providing fundamental information on the interaction between the particle and the material...
Since the introduction of the first commercial systems in the early 1980s laser scanning confocal microscopy (LSCM) has become an established technique in biological and medical fields of research. To date the application of LSCM to metallurgical and tribological fields of research has been extremely limited. However, largely as a result of recent rapid advances in computer processing power, the modern...
Physical vapour deposited (PVD) coatings are often exposed to high temperatures in service, for example, in cutting tool applications, yet laboratory testing of such coatings is usually performed at room temperature. In this work two tribological test methods were used to rank the performance at room temperature and at 350°C in air of four PVD coatings (two TiN coatings of different thickness, TiCN...
A simple physically-based model for the abrasive wear of composite materials is presented based on the mechanics and mechanisms associated with sliding wear in soft (ductile)- matrix composites containing hard (brittle) reinforcement particles. The model is based on the assumption that any portion of the reinforcement that is removed as wear debris cannot contribute to the wear resistance of the matrix...
The present study was undertaken to evaluate the effect of surface roughness of glass-infiltrated alumina on the abrasive wear of hydroxyapatite using a pin-on-disk tribometer. Hydroxyapatite was used as a model material to simulate tooth enamel. The wear tests were conducted in distilled water at room temperature using a constant sliding speed and three loads to model the normal occlusal contact...
Polyamides (PAs) form a major class of tribo-polymers used in almost all types of wear situations. They excel most of the engineering polymers especially in the case of abrasive wear performance. Since methylene ( CH 2 ) to amide ( CONH ) group ratio in PAs control the physical and mechanical properties, it was thought interesting to examine its influence on tribo-performance also. Hence,...
This article discusses the development of a test bench and a methodology for the study of composite resin abrasive wear. To evaluate the operation of the test bench and to compare the proposed methodology with other existing ones, a study was made of the five composites most commonly used by dentists.The one-way ANOVA method and the Tukey test were used to statistically analyze the results by multiple...
The paper deals with the abrasive wear investigations on various composites of phenolic resin filled with alumina powder and abraded against silicon carbide paper under dry and single pass condition. The data analysis was done using orthogonal experimental design method. The objective was to study the influence of variables such as filler concentration, load, sliding speed and abrading particle size...
A model of abrasive wear, which has been used successfully to predict the forces and metal removal rates in abrasive machining is extended to allow the prediction of abrasive deterioration. Attritious wear of the abrasive and transfer of debris are both important factors in reducing abrasive wear over time, but small abrasives are more prone to becoming clogged by debris. Good quantitative predictions...
A study towards the examination of the abrasive wear behaviour and other characteristics, viz. microstructure, tensile properties and hardness of a high strength low alloy steel has been carried out in order to establish a correlation amongst the parameters and to optimize the microstructural features and mechanical properties for superior wear performance. The steel was subjected to various heat...
In this paper, some of the complexities in developing predictive models for polymer composite materials are discussed with particular reference to models based on surface deformation energy. Although there are models available for abrasive wear of metals, polymers and composite materials, models are suitable for a particular wear situation. Most of the cases, the wear models are based on traditional...
In the present paper a model for the abrasive wear of metallic matrix reinforced materials is presented. The model is based on a generalisation to multiphase materials of the Rabinowicz equation, by considering separately the contributions of the reinforcement particles and of the matrix to material loss. The predictions of the model are discussed and compared with experimental results obtained on...
This paper presents friction tests results of AISI 1006 low-carbon steel and an AISI 52100 bearing steel using a spiral pin-on-disk apparatus. 3mm diameter pins on two average (0.06 or 0.20mm) diameters glass particle coated abrasive paper were used. The normal force applied was 20N, the tangential sliding speed was 0.08m/s, and the radial pin movement was 20mm/min. The micro-indentation hardness...
The abrasion resistance of fibres is a basic property in the textile industry since the fibres can be damaged during the manufacturing process. To understand the fundamental mechanisms of abrasion of 40μm diameter polyamide fibres, a tribometer using a fibre-cylinder contact configuration immersed in water has been developed. This instrumented device controls tribological parameters such as the sliding...
Understanding and quantification of ploughing resistance and associated deformation is of primary importance for materials undergoing abrasive wear. The aim of this study is to understand mechanical phenomena induced by a ploughing process. A comparison of numerical simulation with experimental results has been performed in order to validate our numerical model. The process to be studied is the ploughing...
It is presented an investigation of the abrasive wear behaviour of metallic matrix reinforced materials (MMRMs). Micro-scale wear tests were performed on Fe-Cr-C/NbC composite materials with different volume fractions of reinforcement particles, produced by variable powder feed rate laser cladding. The obtained results show that, depending on the conditions on which the wear tests were made, the wear...
The tribological properties of polyamide 11 coated carbon steel injector tubulars are reported using a commercially available micro-abrasion tester, as a candidate method for assessing the abrasive wear of polymer coatings. Efforts have been made to reproduce the wear mechanisms found to predominate in field simulated conditions. The wireline-based tests produced severe grooving abrasion of the polyamide...
The present investigation was dedicated to elucidate abrasive-wear mechanisms during surface grinding of a titanium alloy (TC4) and a nickel-based superalloy (K417) by using silicon carbide (SiC), alumina (Al 2 O 3 ), and cubic boron nitride (CBN) wheels. The temperature at the wheel-workpiece contact zone was measured using a workpiece-foil thermocouple. SEM and EDS were used to examine...
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