İç İçe Geçmiş Silindirik, Yüksek Basınç Altında Çalışabilen, Yüksek Sızdırmazlığa Sahip Titanyum Tüpün, Elektron Işın Kaynağı Yöntemi Kullanılarak Deneysel Kaynak Parametre Karakterizasyon Çalışması İle Elde Edilmesi

Abstract

Around the world, the defence industry is of great importance due to continuous and changing diplomatic balances. The importance of the industry is increasing day by day. At this point, air defence missile systems are one of the most important technologies for countries. In this sense, in the scope of this thesis, the steps of the pressure vessel design which is one of the main components of the system that will serve to meet the IR seeker cooling performance requirement used in air defence missile systems, will be mentioned. The electron beam welding process and process parameters which are the most important part of these design development stages are examined. By developing experiment-based methods, the electron beam welding process and the process parameters have been studied. A design approach has been developed in terms of maximum welding performance when determining parameters. Electron beam welding parameter study is supported by destructive and non-destructive welding inspections. Besides, the burst pressure and He leakage performance of the system is examined. It has been proved experimentally that the pressure vessel provides safety requirements in terms of the burst pressure performance and for the controlled storage conditions about 20 years, the leakage is acceptable. Also, experimental set-ups are designed within the scope of these experiments. In the future, it is of great importance for the preparation of the test infrastructure and readiness for use in similar works. As a result, by this study; a nested cylindrical titanium pressure vessel that has a burst pressure of more than 900 bar, He leakage rate less than 〖5x10〗^(-8) (mbar.lt)/s (At the end of 20 years of service life, less than 1 bar pressure loss), weighs less than 500 g and having a capacity of approximately 90 ml has been obtained and qualified by using electron beam welding method.