15. Research on Fabrication Procedure of Spherical Pressure Hull Made of Titanium Alloy for Deep Submergence Research Vehicle

概要

論文の詳細を見る
Following "Shinkai 2000", the Japanese deep sea research project, the 6000 m class deep submergence research vehicle is under planning. For the research vehicle of this class, from the maneuverability and operationability, of utmost importance is the reduction of weight. As for a pressure hull, which houses crew members, the authors have carried out a series of research for the application of titanium alloy (Ti-6Al-4VELI) considering the strength to weight ratio, and anti-corrosion capability against sea water. The authors have made a full scale model of the pressure hull of Ti-6Al-4VELI for the 6000 m class submersible to establish the manufacturing procedure. And by disassembling the model, the authors have investigated the material characteristics for the application of a deep submergence research vehicle. The research covered the fields of mechanical properties, fracture toughness, fatigue strength, stress corrosion cracking, hardness distribution, micro-structure, and residual stress. As a result, 6Al-4V titanium alloy was confirmed to be one of the most effective material for the pressure hull of the deep submergence research vehicle.
社団法人日本船舶海洋工学会の論文