0
Research Papers: Friction & Wear

Cavitation Erosion Mechanism Based on Analysis of Erosion Particles

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

Department of Mechanical Engineering, Assiut University, Assiut 71516, Egyptabouelkasem@yahoo.com

S. M. Ahmed

Department of Mechanical Engineering, Assiut University, Assiut 71516, Egyptshemy2001@yahoo.com

J. Tribol 130(3), 031601 (Jun 23, 2008) (6 pages) doi:10.1115/1.2913552 History: Received May 22, 2007; Revised March 19, 2008; Published June 23, 2008

The mechanism of cavitation erosion is investigated in detail through observations of the removed particles from pure aluminum (Al-99.999). The particles removed during the incubation stage have distinctive characteristics compared to those removed in the subsequent stages. These characteristics are distinguished by lamellae structure, foldness, waviness, large size as well as one of the particle surfaces appeared to be part of the original face of the specimen. Therefore, these characteristics can be used as a monitor for early detection of cavitation erosion in closed systems. Systematic observations of disloged particles and eroded surface morphology show that the dominant failure mode in cavitation erosion is fatigue.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic view of test apparatus

Grahic Jump Location
Figure 2

MDPR versus time: (i) incubation stage, (ii) acceleration stage, (iii) steady-state stage (iv) attenuation stage; 1–5 particle collective timings

Grahic Jump Location
Figure 3

Micrographs of erosion particles during incubation stage (the arrows show the original face of the specimen)

Grahic Jump Location
Figure 4

High magnification for the surface of particles (a) and (d) in Fig. 3 showing the crack propagation

Grahic Jump Location
Figure 5

Micrographs of erosion particles removed during acceleration stage

Grahic Jump Location
Figure 6

Pair of particles observed during the second stage, the surface of particle on the left appeared to be part of the original face

Grahic Jump Location
Figure 7

High magnification for the right particle in Fig. 6

Grahic Jump Location
Figure 8

Micrograph of particles removed during the steady-state stage

Grahic Jump Location
Figure 9

High magnification for particles in the third stage showing fatigue striations on the particle surfaces

Grahic Jump Location
Figure 10

Micrographs of particles during the attenuation stage at two Intervals 4 and 5 shown in Fig. 2

Grahic Jump Location
Figure 11

High magnification of particles removed in the fourth stage illustrating the fatiguelike striations

Grahic Jump Location
Figure 12

Undetached particle and progress of crack forming fatigue striations

Grahic Jump Location
Figure 13

The eroded surface and undetached particles

Grahic Jump Location
Figure 14

Micrograph of the eroded surface showing the forming of particles and the fatigue fracture development

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In