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1 Advances in Materials Science

1 2001

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Characteristics of the incubation period of the cavitation erosion of aluminium-magnesium alloy PA2

Krella A., Zieliński A.

Advances in Materials Science

2001

Vol. 1, nr 1(1)

62-73

The cavitation attack can cause various damages of the material, depending on cavitation intensity. Herein the relationships between cavitation intensity and the changes of microstructure of aluminium-magnesium alloy are presented. Correlation between energy flux density and mass erosion rate is de-scribed by simple empirical mathematical expression: ER = 1E - 05 J 2 + 0,0005 J, where: J - energy flux density, ER - cavitation erosion rate. Here it is shown that for the intensity of cavitation J<2 mW/m2 the duration of the incubation period is invariable, while at the cavitation intensity J>1 mW/m2 its duration decreases with increasing energy flux density J.