DEVELOPMENT OF ALUMINUM BOBBIN SEALS FOR SEPARABLE CONNECTORS FOR ROCKET FLUID SYSTEMS
Technical Report,01 Jan 1967,31 May 1967
BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS United States
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During earlier research, it was shown that damage to the flanges of the 6061-T6 aluminum AFRPL connector could be prevented if the seal material was softer than the flange material by 20 points Brinell. Under Phase I of follow-on research, five methods of accomplishing this were studied 1 soft coatings, 2 skin annealing, 3 softer aluminum alloys, 4 anodizing the flange, and 5 special aging of 6061-T6. The overaged 6061 aluminum for the seal was selected because of economic and technical reasons. Repeated-assembly, thermal-gradient, and stress-reversal-bending tests were conducted with helium-leakage rates below the limit of 7 x 10 to the minus 7th power atm ccsec. Tentative specifications and standards were revised.