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A long time, cavitation damage seriously affect the service life of the material, cavitation involves many other areas of the ship, hydraulic, mechanical, chemical, power generation, and biomedical. Therefore, the research process and its mechanism of cavitation erosion, improve material anti-cavitation performance, reduce and avoid cavitation damage has a very important significance. Currently, less research on titanium and titanium alloy materials cavitation. Under this situation, the use of ultrasonic magnetostrictive cavitation testing machine., Weight loss method under laboratory conditions, scanning electron microscopy (SEM) and microhardness of surface analysis methods, in-depth study of Ti and Ti-6Al -4V alloy in deionized water and 3.5% NaCl solution cavitation damage behavior, the use of heat treatment and surface treatment of Ti-6Al-4V alloy surface properties optimized against cavitation performance improved materials selected and optimized to provide a theoretical basis. The thesis of the cavitation behavior of pure titanium and Ti-6Al-4V alloy in deionized water and 3.5% NaCl solution. The results showed that the Ti-6Al-4V alloy material more susceptible to cavitation damage in a 3.5% NaCl solution with a higher hardness than pure titanium 8h cavitation lower weight loss, better anti-cavitation performance. The paper studies the effect of heat treatment of Ti-6Al-4V alloy anti-cavitation performance. By different solution and aging process after the duplex microstructure of Ti-6Al-4V and basketweave organization. The results show that the two organizations than annealed Ti-6Al-4V alloy anti-cavitation performance has been significantly improved. Ti-6Al-4V alloy Cavitation Resistance of the strong to weak: baskets organizations, two-state organizations, annealing organization. Have good fatigue resistance, baskets organizations can effectively hinder crack along the orientation direction of expansion, 8h cavitation weight loss is very low, with excellent anti-cavitation performance. Finally, studies of ion implantation on the anti-cavitation behavior of Ti-6Al-4V alloy. The results show that the material by Mo ion implanted Ti-6Al-4V alloy samples, improved surface hardness, anti-cavitation performance improvement to some extent, but the modified material anti-cavitation performance is not such as heat treatment of dual state organizations. Early cavitation, the ion implantation layer can play the role of certain hinder crack and pit generated, time to proceed with the cavitation erosion, ion implantation layer and failed to effectively hinder the expansion of cracks and pits. With cavitation ongoing containing Mo surface ion implantation layer is constantly being destroyed, still form of cavitation damage is more serious of the honeycomb structure.
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