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Fracture temperature and flaw growth in nitronic 40 at cryogenic temperatures
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Domack, M. S. |
| Copyright Year | 1984 |
| Description | The fracture resistance and fatigue response of Armco Nitronic 40 austenitic stainless steel were evaluated under cryogenic conditions. Tensile, fracture toughness and fatigue crack growth properties were measured at -275 F. The tensile yield strength was approximately 120 ksi and the fracture toughness was estimated to be 350 ksi-in /2 on the basis of fracture toughness measurements. Testing was conducted to evaluate the behavior of a simulated section of the wing of the Pathfinder 1 model subject to a load and temperature history typical of that for testing in the National Transonic Facility. The wing section model incorporated a proposed brazing technique for pressure-transducer attachment. The simulated wing section performed satisfactorily at stress levels of nearly 60 percent of the material yield strength. The brazing technique proved to be an effective method of transducer attachment under conditions of high stress levels and large temperature excursions. |
| File Size | 22470718 |
| Page Count | 45 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840015682 |
| Archival Resource Key | ark:/13960/t2s51h83t |
| Language | English |
| Publisher Date | 1984-05-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Low Temperature Tests Finite Element Method Stress Analysis Tensile Stress Wings Charpy Impact Test Low Temperature Brazing Austenitic Stainless Steels Wind Tunnel Models Fracture Strength Cryogenic Wind Tunnels Crack Propagation 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 |
