STRUCTURAL FASTENERS FOR EXTREME ELEVATED TEMPERATURES
Abstract
The materials utilized were molybdenum alloy TZM, columbium alloys Cb752 and C129Y, tantalum alloys T-222 and 90 Ta-10W, and several dispersion strengthened metals. Protective coatings were adapted to fasteners, the columbium coating being an electrophoretically applied adaption of the Tapco Cr- Ti-Si coating and the tantalum coating being an electrophoretically applied WSi2 coating. A facility for dynamic oxidation testing was developed capable of exposing small parts to 3200 degrees F. In air moving at 250 ft. /second. The deformability limits of the coating-substrate systems were established. Deformability of the systems was found to be insufficient to permit the development of a deformable blind fastener. Threaded fasteners were manufactured from a limited number of dispersion strengthened nickel base metals and were tested. Results indicate the feasibility of fastener manufacture from these materials and show considerable promise for their use in the 1800 degree F. to 2200 degree F. temperature range.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1966
- Accession Number
- AD0807437
Entities
People
- E. F. Gowen Jr.
- M. H. Ortner
- S. J. Klach
- T