A Cavitation Erosion Model for Ductile Materials

[+] Author and Article Information
N. Berchiche

Department of Naval Architecture and Ocean Engineering, SE-412 96 Göteborg, Swedene-mail: bena@na.chalmers.se

J. P. Franc, J. M. Michel

Laboratoire des Ecoulements Géophysiques et Industriels, BP 53, 38041 GRENBOLE Cedex 9, France

J. Fluids Eng 124(3), 601-606 (Aug 19, 2002) (6 pages) doi:10.1115/1.1486474 History: Received June 12, 2001; Revised February 18, 2002; Online August 19, 2002
Copyright © 2002 by ASME
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Calculated and measured erosion rates versus the number of shots (stainless steel 316L). The two calculated erosion rates are based upon two different pitting tests used to characterize the flow aggressiveness.
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Computed evolution of the strain on the surface of the material (stainless steel 316L). The blue color corresponds to zero strain, whereas the red color corresponds to the rupture strain in %.
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Computed evolution of the strain field on a cross section of the material and of the shape of the eroded surface
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Cross-section of an eroded sample after 14400 shots (SS316L). The marks for microhardness measurements are hardly visible.
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Principle of the model. The stress-strain relationship, together with the strain profiles inside the material are presented as a function of the exposure time.
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Photograph of the impacted zone on Stainless Steel 316 after a pitting test of 30 shots on the Cavermod. (a) Nomarski interferometric technique; (b) Mirau interferometric technique (100 μm corresponds to 0.8 cm and 0.6 cm, respectively).
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Histograms of pit number (a) and deformed volume (b) corresponding to the pitting test presented in Fig. 2. The deformed volume is defined as the volume of the pits below the original surface.
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Pitting test reproduced by the model. The difference in height between two consecutive curves is .46 μm
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Step-by-step description of the entire predicting process




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