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Uncommon Cr-rich gamma ' precipitation during creep at 950 degrees C in Inconel 617 superalloy with serrated grain boundaries through pre-straining
- Authors
- Lee, Jiwon; Seol, Jae-Bok; Jang, Jae Hoon; Hong, Hyun-Uk
- Issue Date
- 28-Jan-2021
- Publisher
- Elsevier BV
- Keywords
- Superalloy; Thermomechanical processing; Atom probe tomography; Creep; Precipitation
- Citation
- Materials Science and Engineering: A, v.803
- Indexed
- SCIE
SCOPUS
- Journal Title
- Materials Science and Engineering: A
- Volume
- 803
- ISSN
- 0921-5093
1873-4936
- Abstract
- The 5% pre-straining of a Ni-based solid-solution-strengthened superalloy containing serrated grain boundaries promotes the formation of nano-sized precipitates, that is, the L1(2)-ordered Ni3Al phase, during creep at 950 degrees C, instead of the Ti(C,N) phase, as predicted by computational thermodynamics. Atom probe tomography revealed that the nano-sized precipitate was an uncommon gamma' phase partitioned by Cr atoms of more than 14 at%.
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