Technical Briefs

Particle Size Effects on Slurry Erosion of 5117 steels

[+] Author and Article Information
A. Abouel-Kasem

Department of Mechanical Engineering, Faculty of Engineering, King Abdulaziz University, 344 Rabigh 21911, Kingdom of Saudi Arabiaabouelkasem@yahoo.com

J. Tribol 133(1), 014502 (Dec 03, 2010) (7 pages) doi:10.1115/1.4002605 History: Received January 28, 2010; Revised September 09, 2010; Published December 03, 2010; Online December 03, 2010

The effect of particles size and shape on erosion rates and erosion mechanisms of 5117 steels are investigated using slurry whirling-arm ring. Six different sized silica sand particles are used as erodent. These particles are characterized in terms of their average diameter, aspect ratio, and circularity factor. The measured average diameter varies from 112.7μm to 516.4μm. The wear tests are carried out at impact velocity of 15 m/s and 30 deg and 90 deg impact angles using a sand-water mixture of 1wt% concentration. Analysis of erosion rates shows that there exists threshold energy of impacting particles at which a transition in erosion rate is noticed for sizes of 200μm. It is also observed that the erosion rate increases with the increase in shape factors (aspect ratio and circularity factor). The surface morphology of the eroded surface at impact of 30 deg shows that below 200μm, the erosion mechanism is indentation and material extrusion and above 200μm, the erosion mechanism is ploughing.

Copyright © 2011 by American Society of Mechanical Engineers
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Figure 5

Variation of mass loss per particle for 5117 steel with kinetic energy per particle

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Figure 6

Variation of mass loss rate for 5117 steel with measured particle size

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Figure 7

SEM photographs of specimen surfaces eroded for 2 min by SiO2 particles: (a) 516.4 μm and (b) 112.7 μm

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Figure 8

SEM photographs of high magnification of surfaces eroded for 2 min by SiO2 particles: (a) 112.7 μm and (b) 516.4 μm

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Figure 1

Schematic diagram of impact velocity and impingement angle

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Figure 2

Scanning electron micrographs of SiO2 particles

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Figure 3

Variation of mass loss and number of particles with measured particle size

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Figure 4

Variation of mass loss per particle for 5117 steel with measured particle size



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