Abstract
In this study, the anti-impact performance of the TiN coatings prepared under various substrate temperatures (35, 200, 400, and 600 °C) were evaluated using a cyclic impact tester under 104 cycles. Moreover, the microstructure and anti-impact performance-related mechanical properties (adhesion strength and nano-hardness) were investigated to reveal the underlying mechanism of how the substrate temperature affects the anti-impact performance of the coatings. The results showed that the substrate temperature has a great influence on the internal stress, nano-hardness, and adhesion strength as well as the anti-impact performance of TiN coatings, and the coatings prepared under 400 °C exhibit the best impact resistance. The small internal stress, strong adhesion strength as well as high hardness and H3/E2 value for the 400 °C prepared coatings are the main contributes.
Highlights
Titanium alloy, such as Ti6Al4V, has been extensively used in the aviation and aerospace industries due to its excellent mechanical and physical properties [1,2]
The lowest peak impact force and energy absorption rate means the best anti-impact performance of the TiN coatings prepared under this certain substrate temperature
TiN coatings were prepared on the Ti6Al4V titanium alloy substrate using the filtered cathodic vacuum arc (FCVA) method with various substrate temperatures
Summary
Titanium alloy, such as Ti6Al4V, has been extensively used in the aviation and aerospace industries due to its excellent mechanical and physical properties [1,2]. The harsh serving conditions such as sandy and high-speed operations of the aeroengine compressor blades could cause prominent sand erosion damage on the inlet edge of these components. These erosion damage sites will act as the crack initiation origins, which will induce the failure of the fabricated components and pose serious threat to the flight safety [5,6]. The failure of the components can be slowed down in a certain degree
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