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Fatigue characterization of alloy 10: a 1300f disk alloy for small gas turbine engines
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gayda, John |
| Copyright Year | 2000 |
| Description | A detailed fatigue characterization of Alloy 10, a high strength nickel-based disk alloy, was conducted on test coupons machined from a 'pancake' forging. Smooth bar, strain controlled fatigue testing at various R-ratios was run at representative bore, 750 F, and rim, 1300 F, temperatures. This was followed by notch fatigue testing (Kt=2) run under load control. Analysis of the fatigue data using a Smith-Watson-Topper approach and finite element analysis of the notch root was employed to understand material behavior in these tests. Smooth bar fatigue data showed a significant R-ratio dependence at either test temperature which could be accounted for using a Smith-Watson-Topper parameter (SWT). In general, fatigue life was longer at 750 F than 1300 F for a given SWT. For notch fatigue tests, life was longer at 750 F than 1300 F but only at higher stresses. This was attributed to differences in alloy strength. At lower stresses, finite element analysis suggested that convergence of fatigue life at both temperatures resulted from relaxation of stresses at the notch root in the 1300 F tests. |
| File Size | 18307341 |
| File Format | |
| Language | English |
| Publisher Date | 2000-11-01 |
| Access Restriction | Open |
| Subject Keyword | Metals And Metallic Materials Fatigue Tests Finite Element Method Fatigue Life Nickel Alloys Engine Design Fatigue Materials Notch Tests High Strength Alloys 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 |
