SYMPOSIA PAPER Published: 01 January 1974

Applied Cavitation Erosion Testing


When a material has to be applied on locations where cavitation is expected, the resistance against uniform material removal from the surface (Re) and the resistance against pit formation (rp) are of paramount importance.

Experiments with steels and copper-nickel alloys showed that for these materials Re is proportional to the true ultimate tensile strength (σB*) to the 2.3rd power. The tests with the steels were performed under different pressures and at different temperatures. It was found that variations in pressure and temperature did not affect the value of the power exponent. It was further shown that deformation can have a considerable and essentially unpredictable influence on the erosion resistance of materials with a relatively complicated structure. In particular grain boundary precipitation is important in this respect.

Experiments with nitriding steel, carburizing steel, maraging steel, and two cobalt alloys in different conditions of application showed that rp is determined primarily by the structure of the materials. In this case the product of Re and rp (that is, the time to pitting tp) was found to be particularly useful for screening purposes. In the mechanism of pit formation, surface fatigue as well as corrosion can play important roles.

Author Information

Tichler, JW
Metal Research Institute TNO, Apeldoorn, The Netherlands
de Gee, AWJ
Metal Research Institute TNO, Apeldoorn, The Netherlands
van Elst, HC
Metal Research Institute TNO, Apeldoorn, The Netherlands
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Developed by Committee: G02
Pages: 56–74
DOI: 10.1520/STP32219S
ISBN-EB: 978-0-8031-4650-1
ISBN-13: 978-0-8031-0335-1