| Autor: |
Fiaktistov, Y. O., Tsvetkov, Y. N., Kudryavtseva, E. R., Gorbachenko, E. O., Loparev, Y. K. |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 3021 Issue 1, p1-7, 7p |
| Abstrakt: |
The possibility of using the microhardness method to determine the deformation of surface layers during cavitation wear of cast metal alloys is analyzed. The studies were carried out on two casting alloys: titanium alloy and AK12pch silumin. The experiments consisted of two stages. At the first stage, cylindrical samples were made from the listed alloys, which were compressed on a press to a different degree of plastic deformation, then cut in the middle along or across the axis of the sample. The obtained section was ground and polished, and then the microhardness of the obtained sections was measured and calibration graphs of the dependence of microhardness on the intensity of plastic deformation were built. The second stage included tests of alloys for cavitation wear on an ultrasonic magnetostrictive vibrator in fresh water at a frequency and amplitude of oscillations of the end of the concentrator of the device equal to 22 kHz and 28 µm, respectively. During the tests, the microhardness of the worn surface was periodically measured and the dependence of the microhardness on the duration of the cavitation effect was plotted. The maximum achievable value of microhardness during the incubation period of cavitation wear was determined from the maximum point on this dependence. According to the obtained maximum value of microhardness, the corresponding value of the intensity of plastic deformation of the worn surface was "removed" from the calibration curve. The causes of possible errors in determining the deformation of the surface of cast alloys worn during cavitation, when using the microhardness method, are established. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
