Abstract
The influence of the cooling rate on the precipitation behavior of gamma prime (Îłâ˛) in a newly developed Co-based superalloy has been investigated by using differential scanning calorimetry. In addition, changes to the γⲠprecipitate morphology and size were analyzed by scanning electron microscopy. It was observed that increasing the rate at which the alloy was cooled from high temperatures increased the γⲠprecipitation rate at different temperatures but also reduced the temperature at which the maximum precipitation rate occurred and retarded the complete precipitation of the γⲠprecipitates. The activation energy required for γⲠprecipitation was calculated by using the Kissinger model, revealing that the present alloy exhibits higher activation energy than some Ni-based superalloys, which can be attributed to lower rates of atomic diffusion in cobalt-based superalloys.
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.
