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The cavitation erosion behaviour of a number of metals has been studied using a sea water cavitation tunnel test and a fresh water jet cavitation method. Erosion parameters, including erosion rate and depth of damage, have been obtained for both systems and the data shown to correlate with mechanical properties of the metal, such as plasticity and hardness. Analysis of eroded specimens subjected to interrupted jet cavitation tests, combined with parallel microstructural studies on all eroded specimens, have shown that the erosion damage produced by the two test methods, whilst differing in degree, is generally similar in character. Hence it may be concluded that the jet cavitation test provides, with qualification, a satisfactory alternative for the more traditional cavitation tunnel technique. |
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