Loading...
Please wait, while we are loading the content...
The metallurgical structure and mechanical properties at low temperature of nitronic 40 with particular reference to its use in the construction of models for cryogenic wind tunnels
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wigley, D. A. |
| Copyright Year | 1982 |
| Description | Nitronic 40 was chosen for the construction of Pathfinder I, an R & D model for use in the National Transonic Facility, because of its good mechanical properties at cryogenic temperatures. Nitronic 40 contains delta ferrite and is in a sensitized condition. Heat treatments carried out to remove residual stresses also caused further sensitization. Experiments showed that heat treatment followed by cryoquenching removed the sensitization without creating residual stresses. Heat treatment at temperatures of 2200 F was used to remove the delta ferrite but with little success and at the cost of massive grain growth. The implications of using degraded Nitronic 40 for cryogenic wind tunnel models are discussed, together with possible acceptance criteria. |
| File Size | 5131592 |
| Page Count | 65 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820022499 |
| Archival Resource Key | ark:/13960/t3vt6gh0f |
| Language | English |
| Publisher Date | 1982-04-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Ferrites Sensitivity Heat Treatment Austenitic Stainless Steels Transonic Wind Tunnels Mechanical Properties Wind Tunnel Models Rapid Quenching Metallurgy Carbides Cryogenic Wind Tunnels 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 |
