• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.29 no.3 s.234
• /
• pp.477-483
• /
• 2005

A propeller has been considered as one of the most critical elements in propelling ships. However, only a little research on the marine propeller has been carried out. Furthermore, fractures of the propeller have been frequently caused by fatigue, but only tensile strength, yield strength and elongation are discussed in Register of Shipping. For the above reasons, we have evaluated strength properties of A1BC3 and HBsC1, both which have been used for the marine propeller by using air jet chisel and then, presented a method of improving the strength.

• Transactions of the Korean Society of Machine Tool Engineers
• /
• v.17 no.5
• /
• pp.89-94
• /
• 2008

Marine propeller is one of the most important element of ship, it must be taken care of design and maintenance of it. It is inevitable that corrosion pits have occurred on the marine propeller. If corrosion pits have occurred on the blades, they have been repaired ordinary by simple welding methods in shipyards. It must be that the strength is degraded in this process. In this paper, we represent the improvement method of fatigue strength degraded after repairing pits.