Cavitation in a propeller causes erosion, accelerating corrosion, and tearing off blades severe cases. Despite the maintenance requirements caused by cavitation, few studies have investigated cavitation resistance of small ship propellers. Therefore, this study, these characteristics were through demonstration test coastal waters South Korea. erosion analyzed according to low- high-rotational s...

Cavitation has been proven to cause damage hydraulic structures. In recent times, aeration receiving increasing attention as a suitable method for preventing or reducing the erosion effects of cavitation. this study, an orifice with micrometer-sized diameter was designed introducing air bubbles in water examine reduction caused by cavitation ultrasonic environments. The experimental results sho...

A brief status report on bearing technology and present and near-term future problems that warrant research support is presented. For rolling element bearings a material with improved fracture toughness, life data in the low A region, a comprehensive failure theory verified by life data and incorporated into dynamic analyses, and an improved corrosion resistant alloy are perceived as important ...

A CoCrFeNiTiMo high entropy alloy (HEA) coating was prepared onto a Ti-6Al-4 V substrate using the double cathode glow discharge method. This innovative HEA exhibited duplex phase microstructure, composed of BCC-structure solid solution and tetragonal structured intermetallic phase, Co2Mo3, possessed hardness, load bearing capacity strong adhesion to substrate. The underwent much less severe ca...