ISSN: 0090-3973
Page Count: 10

An Improved Method for Determination of the Cavitation Erosion Resistance by a Weibull Distribution
Meged, Y
Formerly Senior Research Engineer, Tribology Group of the University of Twente,

(Received 29 April 2003; accepted 26 March 2004)

Abstract

The improved method for determination of cavitation erosion resistance is based on the erosion strength concept and the Weibull cumulative distribution function. Cavitation erosion resistance is the ratio between the erosion intensity, which is the external load, and the erosion rate, which is the response of the eroded material. The time at which this erosion rate is determined is t²⁰⁰, i.e., when the average eroded thickness reaches 200 µm. This time ensures that the cavitation erosion resistance of both the boundary layer and the base material can be determined. The improved method is simple, easy to apply, and overcomes the drawbacks of the normalized erosion method and the erosion strength method. In this case, cavitation erosion resistance is an independent, measurable value with units of stress.

Keywords:
cavitation erosion resistance, cavitance, erosion strength, vibratory cavitation erosion, affected material zone, erosive boundary layer, Weibull cumulative distribution function, modeling, bimodal Weibull plots, unimodal Weibull plots

Paper ID: JTE11930
DOI: 10.1520/JTE11930
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