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Research Papers: Friction & Wear

Quantitative Analysis of Cavitation Erosion Particle Morphology in Dilute Emulsions

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

Department of Mechanical Engineering, Assiut University, Assiut71516, Egyptabouelkasem@yahoo.com

B. Saleh

Department of Mechanical Engineering, Assiut University, Assiut71516, EgyptḆsaleh@yahoo.com

S. M. Ahmed

Department of Mechanical Engineering, Assiut University, Assiut71516, Egyptshemy2001@yahoo.com

J. Tribol 130(4), 041603 (Aug 06, 2008) (6 pages) doi:10.1115/1.2959108 History: Received December 26, 2007; Revised June 10, 2008; Published August 06, 2008

Wear particles produced by vibratory cavitation erosion tests on 1017 carbon steels in water and oil-in-water (o∕w) emulsions were analyzed. Scanning electron microscope (SEM) images of wear particles were acquired, forming a database for further analysis. The particle morphology features were first clarified. Next, the size parameters (size, area, and perimeter) and shape factors (elongation and roundness) were determined for each test liquid, using image analysis software. The size parameters of the removed particles were higher in water than in o∕w emulsions. While the shape factors could not significantly discriminate between the particles produced in water and o∕w emulsions. The size distribution was in a wide range for water than that for o∕w emulsions. The cavitation erosion mechanism is fatigue failure for water and o∕w emulsions.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic view of test apparatus

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Figure 2

The viscosity, surface tension, and pH as a function of oil-in-water concentrations

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Figure 3

Working principle of ferrograph

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Figure 4

Scanning electron photomicrographs of particles for 1017 carbon steel cavitating in water and o∕w emulsions: (a) water, (b) 1%, (c) 2%, (d) 5%, and (e) 10% o∕w emulsions

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Figure 5

Size distribution of particles for 1017 carbon steel cavitating in water and o∕w emulsions: (a) water, (b) 1%, (c) 2%, (d) 5%, and (e) 10% o∕w emulsions

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Figure 6

Mean parameters of particles for 1017 carbon steel cavitating in water and o∕w emulsions: (a) area, (b) perimeter, (c) elongation, and (d) roundness

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