EDGEWIDE COMPRESSIVE PROPERTIES OF TITANIUM AND NICKEL-BASE SANDWICH CONSTRUCTIONS AT ELEVATED TEMPERATURES.
FOREST PRODUCTS LAB MADISON WIS
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The performance was evaluated of sandwich constructions of titanium and nickel-base alloys having facings resistance-welded to honeycomb cores. Cores were of corrugated foil formed to 14-inch-square honeycomb cells. Properties in edgewise compression, flatwise tension, flatwise compression, and flatwise shear were evaluated at 75 F. for three constructions of each type. Edgewise compressive properties were also evaluated at temperatures of 400, 800, and 1200 F. for the titanium sandwich and at 800, 1200, 1400, and 1600 F. for the nickel-base sandwich. The edgewise compressive strength-temperature relationship was nearly linear between 75 and 1200 F. for the titanium sandwich constructions, the strength at 1200 F. being about 30 percent of that at 75 F. The edgewise compressive strength of the nickel-base sandwich constructions at 1200 F. was about 85 percent of that at 75 F., 70 percent at 1400 F., and 30 percent at 1600 F. The titanium sandwich constructions were found to have the greatest strength-to-weight ratios below about 900 F., but above that temperature the nickel-base sandwich constructions had the greatest strength-to-weight ratios.
- Metallurgy and Metallography
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