Abstract
The fatigue fracture of commercially pure (cp) titanium tubes at relatively low temperatures [120° C (250° F)] in a shell-and-tube heat exchanger was studied. The cp titanium tubes were subjected to flow-induced vibration and compression axial loading in service. The combined stresses resulted in numerous intergranular cracks in circumferential direction. Some cracks reached a size that resulted in complete rupture of tubes. Fractographic analyses indicated that the fracture was caused by high-cycle fatigue. A large portion of the tube wall indicated a lack of characteristic ductility of cp titanium. The reduced ductility was a result of second-phase particle inclusion and hydrogen absorption in tube material. The secondphase particles provided easy sites for initiation and coalescence of microvoids. Hydrogen absorption of titanium resulted in an increase in hydride content and thus a decrease in ductility.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
