Abstract
Titanium welded tubes are widely used in condensers and heat exchangers of coastal power plants because of their excellent manufacturing properties and seawater corrosion resistance. In this paper, the leakage analysis of titanium welded tubes of condensers in nuclear power plants that after 4 years of service is carried out, and experimental studies such as morphology analysis, chemical composition analysis, hardness test, metallographic examination, mechanical properties test, and scanning electron microscope analysis are conducted. The results show that the cracks initiated at the maximum vibration amplitude of the titanium welded tube and gradually expanded in a fatigue method. Large vibration of the titanium welded tube is the main cause of the leakage.
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