Abstract
The mechanical properties depend on the morphology, size, and contents of γ′, γ″ and δ phases in Inconel 718 superalloy. Hot Isostatic Pressing (HIP) has been widely used in the casting industry to remove internal porosity generated during the casting process. The aim of this study is to examine the TEM observation of γ′, γ″ and δ precipitations on 718 superalloy through HIP treatment, and evaluate the effects of HIP treatment for the 718 alloy. The experimental results showed that the grain sizes are uniform and the porosity-segregated structure is improved. Meanwhile, tensile strength and elongation also can be increased through HIP treatment. The results demonstrated an obvious decrease in the δ precipitation and increase in the γ″ strengthened phase of 718 superalloy. Observed TEM on the HIP treated 718 superalloys presented, MC carbides and δ precipitate at the grain boundary and a uniform precipitation of γ′ and γ″ in the matrix.
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.
