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On the rhenium segregation at the low angle grain boundary in a single crystal Ni-base superalloy.
- Source :
-
Scripta Materialia . Aug2020, Vol. 185, p88-93. 6p. - Publication Year :
- 2020
-
Abstract
- Industrial scale single crystal (SX) Ni-base superalloys contain numerous low angle grain boundaries inherited from the solidification process. Here, we demonstrate that low angle grain boundaries in a fully heat-treated SX model Ni-base superalloy are strongly segregated with up to 12 at% Re. Some Re-rich dislocations forming this grain boundary are found located inside γ, others close to a γ/γ′ interface. Although these segregated Re atoms lose their solid-solution strengthening effect, they may enhance the creep resistance by pinning the low angle grain boundaries and slowing down dislocation reactions. Image, graphical abstract [ABSTRACT FROM AUTHOR]
- Subjects :
- *CRYSTAL grain boundaries
*HEAT resistant alloys
*RHENIUM
*ATOM-probe tomography
Subjects
Details
- Language :
- English
- ISSN :
- 13596462
- Volume :
- 185
- Database :
- Academic Search Index
- Journal :
- Scripta Materialia
- Publication Type :
- Academic Journal
- Accession number :
- 143617633
- Full Text :
- https://doi.org/10.1016/j.scriptamat.2020.03.063