DESIGN DATA STUDY FOR COATED COLUMBIUM ALLOYS.
Abstract
A series of preliminary evaluation tests were conducted with Pfaudler and TRW protective coatings on 30 mil B-66 and X-110 columbium alloy sheet. Two modified silicide coatings applied by one and two-cycle Pfaudler coating processes and the TRW Cr-Ti-Si coating were comparatively evaluated on the two alloys, prior to initiation of the Design Data Study. Data are presented from one atmosphere cyclic oxidation tests of the six coating-base metal systems at 1600, 2000, 2300, and 2600 F. The influence of elevated temperature-reduced pressure exposure on the various coating systems was studied for 1 and 2 hour 2500 F exposures at 10 to the -1st power and 1 mm pressures. Post oxidation in air at 2600 F was utilized as the criteria for evaluating reduced pressure coating degradation. Room temperature bend ductility data are presented for tests on as coated sheet an on coated sheet after cyclic oxidation for 100 hours at 2000 F and 4 hours at 2600 F. Smooth and notch tensile data are reported for tests performed on uncoated and coated sheet at room temperature and 1200 F. The tensile behavior of coated B-66 and X-110 alloys is discussed relative to that of previously studied FS-85 columbium alloy. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1963
- Accession Number
- AD0416459
Entities
People
- D. B. Warmuth
- J. D. Gadd