Accession Number:

ADA370445

Title:

Innovative Fabrication Techniques for Aerospace Propellant and Pressurant Tanks. Phase 1

Descriptive Note:

Final rept. Jun-Dec 98

Corporate Author:

ELECTROFORMED NICKEL INC HUNTSVILLE AL

Report Date:

1999-07-14

Pagination or Media Count:

57.0

Abstract:

To be economically attractive, weight and performance for small earth-to-orbit launch systems and station keeping space vehicles must be improved at significantly lower costs while maintaining required payloads. A major weight and cost factor in any of these devices is the tankage for propellants and pressurant gases. Innovative and proven manufacturing technologies such as electroforming have been over-looked as means to meet these needs. Electroforming offers the means to fabricate seamless tanks with no property degrading welds. In conjunction with filament winding electroforming can produce improved tanks in greatly reduced time frames, because it can produce the material and the net shape simultaneously. In this study, it has been shown that pure nickel electrodeposits in very small thicknesses suitable for tank liners can be made with ample ductility for expansion as a sealant against outer shells of high modulus such as filament wound graphite fibers. Ability to electroform seamless thin-wall tanks with integrated filldrain ports has been shown. Electroform joining of tank components without thermal means has been proven.

Subject Categories:

  • Laminates and Composite Materials
  • Astronautics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE