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Deleterious phase formation in next- generation nickel-base superalloys predicted
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ritzert, Frank J. |
| Copyright Year | 1999 |
| Description | Nickel- (Ni-) base superalloy single crystals represent the state-of-the-art for turbine engine airfoil applications because they offer the best balance of properties under the high operating temperatures required for efficient engine operation. Current trends in alloy design take advantage of improved creep rupture strength with the addition of higher levels of refractory elements. In particular, the addition of significantly higher levels of rhenium in third-generation superalloys is key for both microstructural stability and creep rupture strength. Although refractories provide strength benefits, alloys tend to be unstable when their refractory content is high because of topologically close-packed (TCP) phases. The formation of these phases in sufficient amount is detrimental to the performance of these alloys because of their brittle nature and because they deplete the Nirich matrix of potent solid-solution strengthening elements. |
| File Size | 104772 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050182035 |
| Archival Resource Key | ark:/13960/t4rj9cx7p |
| Language | English |
| Publisher Date | 1999-04-01 |
| Access Restriction | Open |
| Subject Keyword | Metals And Metallic Materials Single Crystals Nickel Alloys Heat Resistant Alloys Creep Rupture Strength Airfoils Rhenium High Temperature Thermal Stability Turbine Engines Matrices Mathematics Operating Temperature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
