Abstract
The oxidation behavior of a superalloy with the chemical composition (wt.%) of Al 5.5-Ti 2.6-Co 4.8-Mo 3.9-W 5.0-Cr 11.0-Ni bal at 850°C and 950°C in air has been investigated. The kinetics curves of the oxidation were measured by thermal gravimtric analysis (TGA), and the microstructure and the elements distribution in the different regions of the specimens after oxidation were analysed by XRD and SEM/EDAX. The experimental results showed that the oxidation rate in the primary stage was high, then the mass gaining rate decreased gradually with the oxidation time, and the oxidation kinetics obeys parabolic law. A small amount of oxide scale spallation happened during the oxidation at 950°C. The analysis of the specimens after oxidized at 950°C revealed that three oxide layers formed, including the outer layer consisting of TiO2 and CrTiO3, the middle layer consisting of Cr2O3, Ni(Cr2O4) and TiO2 phases, and internal oxidizing layers identified as Al2O3 phase
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.
