Abstract
γ′-Precipitation strengthened Ni based superalloys are extensively being accepted for gas turbine components, because these material have excellent mechanical properties, as well as corrosion and oxidation resistance at high temperatures above 1000°C. Transient liquid phase (TLP) bonding is an essential technique for gas turbine component repair. In this article, TLP bonding characteristics of two types of γ′ precipitation strengthened superalloys − GTD111 solidified directionally and Udimet520 wrought − were investigated to approve this technique for the repair of components. TLP bonding was carried out with an amorphous filler metal in various bonding conditions. The microstructural characterization of the joints was examined through optical microscopy (OM) and electron probe micro-analysis (EPMA). The experimental results showed clearly that TLP joints of these superalloys had different TLP bonding behaviors according to the bonding temperatures, and that microstructures such as dendritic structures and the melting points of the base metals had critical effects on these bonding behaviors.
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.
