Behavior of Eutectic Ti–Si–Zr Titanium Alloys in Different Friction Conditions
Powder Metallurgy and Metal Ceramics, ISSN: 1573-9066, Vol: 61, Issue: 7-8, Page: 432-440
2022
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Article Description
The tribological properties of heterogeneous Ti–Si–Zr titanium alloys with an e(β-Ti + (Ti, Zr)Si) eutectic were studied in different friction conditions. Tribological tests were performed with two methods. The samples were subjected to shaft–bush (counterface–material) tests by dry friction against ShKh15 steel employing an M-22M machine at a load of 20 N and a sliding speed of 1–6 m/sec with one method. The other method involved quasistatic and dynamic sphere–plane tests with an effective load of 30 N employing a computer-assisted tribology system. The indenter materials were ShKh15 steel and SiN ceramics. The tests were performed at a sliding speed of approximately 0.0147 m/sec in water. The linear and weight wear rate for the cast Ti–10Si–10Zr–1Sn sample with a superfine eutectic structure determined with the first method at the greatest test speed (6 m/sec) was found to be 1.4 times higher than that of the Ti–9Si–7.6Zr alloy. The Ti–10Si–10Zr– 1Sn alloy showed the lowest wear resistance under quasistatic and dynamic loads with the second method, regardless of the indenter material (ShKh15 or SiN). Contrastingly to the previous data for cast irons and steels, the eutectic Ti–Si–Zr titanium alloys for the first time showed smaller wear under dynamic loading than under quasistatic loading. Thermomechanical treatment of the hypoeutectic Ti–9Si–7.6Zr alloy was established to increase its wear resistance by more than 1.6 times.
Bibliographic Details
Springer Science and Business Media LLC
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