Understanding particle dynamics in erosion testers—A review of influences of particle movement on erosion test conditions

Deng, Tong; Bingley, M.S.; Bradley, M.S.A.

doi:10.1016/j.wear.2009.02.020

Cited by 11 publications

(13 citation statements)

References 23 publications

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“…However, if there is a stream, interactions within the stream, at or near the surface, may well affect the actual impingement velocity (magnitude and direction) for each particle. Deng et al [31], for example, have found, for an average velocity of about 20 m/s, that actual particle velocities at the outlet of the acceleration tube varied from 6 m/s up to 30 m/s. Moreover, Shipway and Hutchings [32] have suggested that the particles in the acceleration tube are subject to many impacts between themselves and with the wall of the nozzle as they are accelerated, and that such impacts will tend to reduce the final velocity.…”

Section: Glass Beadsmentioning

confidence: 99%

Acoustic emission monitoring of abrasive particle impacts on carbon steel

Droubi

Reuben

White

2011

Proceedings of the Institution of Mechanical Engineers, Part E:

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The estimation of energy dissipation during particle impact is a key aspect in evaluating the abrasive potential of impact process. Whereas numerous numerical and analytical approaches exist, aimed at explaining observed wear phenomena, few researchers have attempted to measure the energy dissipation during impact. This article reports the results of systematic acoustic emission (AE) energy measurements aimed at detecting the amount of energy dissipated in a carbon steel target during airborne particle impact. Three experimental arrangements were used to investigate three impact regimes; low velocitylow mass (impact speeds of 12.5 m/s and masses of 4.9 Â 10 À6 to 2.3 Â 10 À4 g), low velocityhigh mass (sphere masses of 0.0012 g), and high velocitylow mass (impact speeds of 416 m/s). Within each of these regimes, both single-particle and multiple-particle impacts were studied in order to investigate the effect of overlapping events. Two parameters, particle diameter and particle impact speed, both of which affect the energy dissipated into the material were investigated and correlated with AE energy. The results show that AE increases with the third power of particle diameter, i.e. the mass, and with the second power of the velocity, as would be expected. The diameter exponent was only valid up to particle sizes of around 1.5 mm, an observation which was attributed to different energy dissipation mechanisms with the higher associated momentum. The velocity exponent, and the general level of the energy were lower for multiple impacts than for single impacts, and this was attributed to particle interactions in the guide tube and/or near the surface leading to an underestimate of the actual impact velocity in magnitude and direction.

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Section: Glass Beadsmentioning

confidence: 99%

Acoustic emission monitoring of abrasive particle impacts on carbon steel

Droubi

Reuben

White

2011

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…In mechanically powered type erosion testers, the particles are accelerated and launched with mechanical forces rather than compressed air. The three main types of mechanical erosion testers are: the centrifugal erosion tester [25][26][27][28][29][30][31], the rotary target with free falling abrasive particles [32], and the rotary cogwheel blaster [33].…”

Section: Mechanically Powered Erosion Testing Equipmentmentioning

confidence: 99%

“…Soderberg et al [25] slightly modified the design, naming it 'Erofuge' and derived the formula for particle velocity, particle fluxes and erosion rates. Based on the original design of Kleis et al and modified design of Soderberg et al, the centripetal accelerator erosion test facility [27][28][29][30][31] that was used by the Wolfson Centre for Bulk Solids Handling Technology of the University of Greenwich consisted of a balanced disc whose velocity of rotation could be varied continuously or fixed at any given value. The disc was 0.12 m in radius and contained six radial channels made from a high quality alumina ceramic.…”

Section: Design and Constructionmentioning

confidence: 99%

The Effect Of Tangential Velocity Component In Abrasive Jet Micro-Machining Of Borosilicate Glass

Hasem¹

2021

Preprint

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Generally two types of erosion testers are used in solid particle erosion testing: air blast erosion testers and mechanically powered erosion testers. In the first portion of this thesis, the feasibility of implementing a mechanically powered erosion tester for abrasive jet micro-machining applications using very small particles was studied. It was found that, due to the ultrahigh vacuum requirement, such a device would not be practical. Therefore, in the second part of the thesis, the designed rotary mechanism was utilized as a rotary disc target holder apparatus and blasted with a typical air blast system. The apparatus could add or deduct a tangential velocity component into the system, allowing for detailed studies of the effect that the tangential velocity component has on the erosion of borosilicate glass using 25-150 μm aluminum oxide particles. Although the tangential velocity effect has been ignored for brittle materials by most researchers, the present results show that it can have an important role in erosion rate.Generally two types of erosion testers are used in solid particle erosion testing: air blast erosion testers and mechanically powered erosion testers. In the first portion of this thesis, the feasibility of implementing a mechanically powered erosion tester for abrasive jet micro-machining applications using very small particles was studied. It was found that, due to the ultrahigh vacuum requirement, such a device would not be practical. Therefore, in the second part of the thesis, the designed rotary mechanism was utilized as a rotary disc target holder apparatus and blasted with a typical air blast system. The apparatus could add or deduct a tangential velocity component into the system, allowing for detailed studies of the effect that the tangential velocity component has on the erosion of borosilicate glass using 25-150 μm aluminum oxide particles. Although the tangential velocity effect has been ignored for brittle materials by most researchers, the present results show that it can have an important role in erosion rate.

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“…Other researchers have also extensively investigated the particle velocity effect on the solid particle erosion behavior of materials [32,[36][37][38][39][40][41][42][43][44][45][46][47][48]. Figure 2(a) shows erosion rates of samples as a function of particle pressure at 30°, 60° and 90° impingement angles.…”

Section: Solid Particle Erosion Behavior -Eroded Surfaces Morphologymentioning

confidence: 99%

Effect of Solid Particle Erosion on the Aqueous Corrosion Behaviour of a Ti6Al4V Sheet

Karantzalis¹

2017

Mater. Sci. Eng. Adv. Res

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The economic and effective operation of machinery and plant involved in fluids handling is increasingly dependent on the utilization of materials that combine high corrosion resistance and good wear resistance.The present study was undertaken in order to investigate the effect of solid particle erosion on the surface characteristics, the microstructure and the aqueous corrosion behavior of a Ti6Al4V sheet metal alloy. The scope of the present effort is to examine the possible way the solid particle erosion affect, by altering the Ti6Al4V surface characteristics, the subsequent electrochemical corrosion response. As for the solid particle erosion tests, three (3) different impact angles were selected, 30°, 60° and 90° degrees respectively. Angular alumina particles of 177 -250 μm size was used as the eroding media, injected, under 1 and 2 bars pressure, on the sample surface located at 10 mm distance from the injection nozzle. The mass loss was weighted and the wear rates were calculated. Surface roughness of the eroded surfaces was assessed and the microstructural modifications were evaluated using optical microscopy and SEM-EDX.Cyclic polarization measurements were conducted in an electrolyte simulating body fluids in order to ascertain the corrosion response of the surface treated samples. SEM-EDX analysis of the corroded surfaces was used in order to assess the corrosion mechanisms and the involved phenomena and to correlate them with the surface and the overall microstructural modifications.

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Understanding particle dynamics in erosion testers—A review of influences of particle movement on erosion test conditions

Cited by 11 publications

References 23 publications

Acoustic emission monitoring of abrasive particle impacts on carbon steel

Acoustic emission monitoring of abrasive particle impacts on carbon steel

The Effect Of Tangential Velocity Component In Abrasive Jet Micro-Machining Of Borosilicate Glass

Effect of Solid Particle Erosion on the Aqueous Corrosion Behaviour of a Ti6Al4V Sheet

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