OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 1 2022 Ta b l e 1 Cavitation test modes Parameter Value Vibration frequency, kHz 20 ± 0.1 Peak-to-peak displacement amplitude, μm 53 ± 3.0 Test environment Tap water, pH 7.5 ± 0.20 Applied voltage, V 8.5 Testing time, min 300 Temperature Room Fig. 3. Scheme of the installation for cavitation erosion testing cleaned with acetone, dried with warm air for 30-40 seconds, and weighed on a balance with an accuracy of 0.5 mg. The difference between the initial mass of the sample and the measured mass after cavitation represents the mass loss at each test interval. To study phase transformations occurring during cavitation, X-ray diffraction analysis (XRD) was performed on a Shimadzu XRD-7000 diffractometer (Shimadzu, Japan) in a Cu Kα radiation, graphite monochromator (angular range 2θ from 30˚ to 115˚ with 0.04˚ scanning step for 3 s exposure). The analysis was performed for samples after tests, the duration of which corresponded to the time of measurements of weight loss. Results and discussion The results of cavitation tests are given in Table 2.As seen, the cavitation erosion resistance of 60Cr8TiAl is about 10 and 4 times higher comparing to AISI 316L and E308L-17, respectively.
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